Statements that control the flow of execution in a script are called control statements. The three types of control statements in VBScript are: conditional, loop, and exit. Each type of statement has a specific purpose.
Conditional statements are used to execute a certain block of code only if a certain condition is met. If the condition is not met, the code is skipped over. An example of a conditional statement would be an IF…THEN statement.
Loop statements are used to repeat a block of code until a certain condition is met. There are two types of looping constructs in VBScript: FOR…NEXT loops and DO…WHILE loops.
Exit statements are used to immediately stop the execution of a script.
There are two types of exit statements: RETURN and EXIT SUB/FUNCTION .
In computing, a control statement is a statement that specifies whether or not a certain section of code should be executed. In VBScript, there are three main types of control statements: if…then…else, for…next, and do…loop. If…Then…Else Statements
If…then…else statements are used to make decisions in your code. The syntax for an if statement is as follows: If condition then ‘code to execute if condition is true Else ‘code to execute if condition is false
End If For example, the following code will print “Hello World” if the variable myVar equals 1: If myVar = 1 Then Wscript.Echo “Hello World” End If You can also add an elseif clause to an if statement.
This allows you to check multiple conditions: If condition1 then ‘code to execute if condition1 is true
Elseif condition2 then ‘code to execute if condition2 is true Elseif condition3 then …etcetera until all conditions have been checked….Finally, you can use else clauses as a catch-all. Anything that doesn’t match any of the other conditions will be executed by the else clause: Otherwise (condition) Then Do……. Loop Statements A do loop will execute a block of code repeatedly until a given condition evaluates to false.
Control Statements in Javascript
If you’ve ever written code, you’re probably familiar with control statements. Control statements are used to control the flow of your program – they allow you to make decisions about what code should be run, and when. In JavaScript, there are three main types of control statement: if/else, switch, and for/while loops.
We’ll take a look at each of these in turn. If/else statements are used to execute code conditionally – that is, depending on whether a certain condition is true or false. For example, let’s say we have a variable called ‘age’.
We can use an if/else statement to check whether age is greater than 18: if (age > 18) { console.log(“You’re an adult!”); } else { console.log(“You’re not an adult yet.”); } Switch statements are similar to if/else statements, but they’re usually more efficient for large numbers of conditions.
A switch statement looks like this: switch (expression) { case value1: // do something break; case value2: // do something else break; default: // do something else } The ‘expression’ in a switch statement is evaluated once – the resulting value is then compared to the values in each ‘case’.
If there is a match, the code associated with that case is executed. If there isn’t a match, and there is a ‘default’ case specified, the code associated with that will be executed instead. For / while loops are used to execute code multiple times – either until a certain condition is met (a ‘while’ loop), or for each element in an array or collection (a ‘for’ loop).
A simple while loop might look like this: var i = 0; while (i < 10) { console.log(i); i++; } This will print out the numbers 0-9 to the console.
Note that it’s important to increment the value of ‘i’, or else the loop will never end! A for loop looks like this: for (var i=0; i<10; i++) { console.log(i); } This does exactly the same thing as our while loop above – it prints out 0-9 to the console. However, it’s generally considered more concise and easier to read.
If Else in Vbscript W3Schools
If Else in VBScript The If Else statement is a type of conditional statement that allows you to execute one or more code blocks based on a specified condition. The If Else statement contains the following components:
The If keyword followed by a condition. If the condition evaluates to True, the code block following the If keyword is executed. Otherwise, the code block following the Else keyword is executed.
- ElseIf (optional) – Allows you to specify additional conditions.
- Else (optional) – Specifies a code block that is executed if all conditions are False.
Vbscript If Else Multiple Conditions
When it comes to programming, there are often multiple ways to get the same result. The same is true for the if-else statement in VBScript. In this blog post, we’ll take a look at how to use the if-else statement with multiple conditions.
The if-else statement is used to execute a block of code based on a condition. If the condition is true, the code in the first block will be executed. If the condition is false, the code in the second block will be executed.
It’s important to note that an else statement is not required. You can have an if statement without an else statement. However, you cannot have an else statement without an if statement.
Here’s a simple example: If x > 10 Then MsgBox “x is greater than 10”
Else MsgBox “x is less than or equal to 10” End If
In this example, we’re using a single condition (x > 10). If that condition evaluates to true, then the message “x is greater than 10” will be displayed. If it evaluates to false, then the message “x is less than or equal to 10” will be displayed.
Easy enough! But what if we want to check multiple conditions? That’s where things can get a little more complicated…but not much! If you want to check multiple conditions, you can use the And operator: If x > 10 And y < 20 Then MsgBox “Both conditions are true!” Else MsgBox “One or both conditions are false.”
Vbscript If Statement
If you’re working with the Microsoft scripting language, VBScript, then you may need to use an If statement at some point. An If statement allows your code to make decisions based on conditions that you specify. In this article, we’ll take a closer look at how the VBScript If statement works and provide some examples of its usage.
The basic syntax for an If statement in VBScript is as follows:
If condition Then action Else action2 End If
As you can see, there are three possible actions that can be taken depending on the condition specified.
The first action is taken if the condition evaluates to True, while the second action is executed if the condition is False. There’s also an optional Elseif clause that can be used to check for additional conditions. Here’s a more complete example of how an If statement might be used:
Vbscript If Equals
If you’re working with VBScript, sooner or later you’ll need to make comparisons. That’s where the “If…Then” statement comes in. The most common form of the “If” statement looks like this:
If condition Then result1 Else result2 End If In this example, “condition” is a logical expression that can be either true or false.
If the condition is true, then VBScript will carry out the instructions in the first block (“result1”), and if it’s false, it will do whatever is in the second block (“result2”).
Vbscript If Not
If you’re working with VBScript, you may come across the need to use an “if not” statement. This can be confusing for beginners, but it’s actually quite simple. Let’s take a look at how to use an “if not” statement in your scripts.
First, let’s review what an “if” statement looks like in VBScript:
If condition Then
‘ Statements to execute if condition is True
Else
‘ Statements to execute if condition is False
End If
An “if not” statement simply reverses the logic of an “if” statement. So, the code above would become this:
If Not condition Then
‘ Statements to execute if condition is False
Else
‘ Statements to execute if condition is True
End If
As you can see, the only difference is that we’ve added the word “Not” before our condition. That’s all there is to it!
You can use an “if not” statement anywhere you would normally use an “if” statement. Just keep in mind that it will reverse the logic of your conditions.
While Loop in Vbscript
A while loop in VBScript is a construct that allows you to repeat a block of code while a condition is True. The code inside the loop will execute as long as the condition remains True. Once the condition becomes False, execution will move on to the next line of code after the loop.
One common use for a while loop is to read data from a file or other source until there is no more data to read. In this example, we’ll use a text file as our data source. We’ll open the file and then use a while loop to read each line of text until we reach the end of the file:
Set objFSO = CreateObject(“Scripting.FileSystemObject”)
Set objFile = objFSO.OpenTextFile(“c:\data\input.txt”)
strLine = objFile.ReadLine
While Not objFile.AtEndOfStream
‘do something with strLine here
strLine = objFile.ReadLine
Functions in Vbscript
In VBScript, a function is a subroutine that can be called from anywhere within your code. Functions can take one or more arguments, and can return a value back to the code that called them.
One of the most useful features of functions is that they can be used to modularize your code.
By breaking your code up into small, reusable pieces, you can make your scripts much easier to read and maintain. Functions also make it easy to reuse code in multiple scripts – if you have a function that you use often, you can simply copy/paste it into new scripts, rather than having to rewrite it each time.
To create a function in VBScript, use the Function keyword:
Function MyFunction(arg1, arg2)
‘code goes here… End Function
MyFunction takes two arguments – arg1 and arg2 . These arguments are passed in when the function is called, and are available within the function as variables. So for example, if MyFunction was called like this:
What is Control Structure in Vbscript?
In computer programming, control structure is the sequence of program instructions that determine what steps the computer should take to solve a problem. In other words, it is the order in which the computer will execute the instructions given to it. There are three main types of control structures:
- Sequential: This type of structure simply means that the instructions are executed in the order they are written.
- Selection: This type of structure allows the programmer to choose which instruction should be executed next, based on certain conditions. The selection structure is usually implemented using an if-then statement.
- Repetition: This type of structure allows the programmer to repeat a set of instructions multiple times. The repetition structure is usually implemented using a loop. VBScript uses all three of these control structures.
Let’s take a closer look at each one. Sequential Structure: As we mentioned before, this type of structure simply means that instructions are executed in the order they are written. In VBScript, sequential execution is accomplished by writing each instruction on its own line and letting VBScript execute them one after another automatically.
For example: MsgBox “This message will appear first” MsgBox “This message will appear second”
In this code, there are two msgbox statements. The first one will cause a message box to appear with the text “This message will appear first”. Once you click OK on that message box, VBScript will move on to executing the second msgbox statement, which will cause another message box to appear with the text “This message will appear second”.
So as you can see, VBscript executes each line sequentially from top to bottom unless told otherwise by a selection or repetition structure. Selection Structure: As we mentioned before, selection structures allow you to choose which instruction should be executed next based on certain conditions. The most common way to create a selection structure in VBscript is by using an if-then statement (though there are other ways as well). An if-then statement has two parts:the condition andthe action .The syntax for an if-then statement looks like this: If condition Then ‘if part ‘action part So for example, let’s say we only want our second msgbox above to appear if today is Monday .We could write it like this:
What are Control Statements?
A control statement is a statement in a computer program that specifies how the program should proceed. Control statements can be used to make decisions, repeat actions, and exit from loops or subroutines.
One common type of control statement is the if-then statement.
This statement tells the computer to execute a certain set of instructions only if a particular condition is true. For example, an if-then statement might tell the computer to print out a message only if the user has entered an incorrect password.
Another common type of control statement is the while loop.
This type of statement allows you to repeat a set of instructions until a specific condition is met. For example, you could use a while loop to keep asking the user for their password until they enter it correctly.
Control statements are an essential part of programming and are used in almost all programs, regardless of how simple or complex they may be.
What is Conditional Statements in Vbscript?
A conditional statement is a set of commands that will only be executed if certain conditions are met. In VBScript, there are several different types of conditional statements that can be used, including:
- If…Then…Else – This type of statement will execute one set of commands if a condition is true, and another set of commands if the condition is false.
- For…Next – This type of statement will execute a set of commands for each item in a list or array.
- Do…Loop – This type of statement will execute a set of commands until a specific condition is met. VBScript also has several built-in functions that can be used to test conditions, such as:
- IsNull – This function will return true if the value passed to it is null (i.e. empty).
- IsArray – This function will return true if the value passed to it is an array.
- IsNumeric –This function will return true if the value passed to it can be parsed as a number.
What are Control Statements Types?
There are three types of control statements in programming:
- Selection Statements – These allow you to choose which part of your code will be executed, based on a certain condition being met. The most common selection statement is the if statement.
- Iteration Statements – These allow you to repeat a section of your code multiple times. The most common iteration statement is the while loop.
- Jump Statements – These allow you to break out of a loop or jump to a different section of code altogether. The most common jump statement is the break keyword.
VBScript – Loops and loop Control Statements
Conclusion
There are three control statements in VBScript- if…then…else, Do…Loop, and Select…Case. The If statement allows you to execute a set of statements only if a condition is True. The Do loop lets you execute a set of statements multiple times until a condition is met.
And finally, the Select Case statement lets you choose from multiple sets of code to run, based on the value of an expression.