Visual basic looping code#

If you execute the code, you will get the output like this:Д«y default, the counter variable is incremented by one.

The Next statement increases the counter variable by one. The вЂњVBScript For loopвЂќ specifies the counter variable and its start and end values.

Visual basic looping code#

The For-Next loop can be used to execute a block of code for a specific number of times. As Do While is more structured than WhileвЂ¦.Wend loop, programmers usually use Do While statements. WhileвЂ¦Wend loop is similar to Do While loop though not used commonly. Here the loop is exited when the value of x becomes 3. If you execute the code, your output will look like this: Suppose you want to exit the block when the value of x becomes 3 in the above program, then you need to code like this: If you want to exit a Do While or Do Until loop in between, then you can use Exit Do statement. Similar to Do вЂ¦.Loop While, we have to DoвЂ¦Loop Until as well. You will see the Welcome message four times. This will give you the same output as the first block of code in Do While loop. The first block of code in Do Until loop (Do While x вЂDo UntilвЂ™ loop is also used when you do not know the number of time you need to execute a block of code. Here the condition is checked only after executing the loop once. If you execute this code, you will get the message вЂњWelcomeвЂќ just once. Suppose you want to execute the block of code at least once regardless of the condition, then you can use Do While loop. If you assign the value 7 to the variable x at the beginning, then the code block will not be executed even once. So, while using Do While looping statements, you should make sure that there is some code that will make the looping condition true at one point or another. Infinite loops could even crash your system. This kind of loops is known as infinite loops. If you forget the statement x=x+1, then your loop will become a never-ending one. The block gets executed four times (when x=1,2,3 and 4) and the loop ends when the value of x becomes 5. If you try executing the code, you will get the output like this: In such case, Do While loop will be used. For example, you want to output the message вЂњWelcomeвЂќ while the value of the variable x is less than 5. If you do not know the number of times you need to execute a block of code, then you will be using Do While loops. LetвЂ™s take a look at these looping statements one by one. So based on whether you know or do not know the number of executions, you can use different types of looping statements.ДЇorвЂ¦Next looping statements are used if you want to repeat a block of code a finite number of times, that if you know the number of times if you want to repeat the block of code.Дo While and Do Until looping statements are used when you want to repeat a block of code until a condition becomes true or false, that is when you are not aware of the number of times you want to execute the block of code. Here, you do not know how many times the loop is to be executed. Suppose, you want to calculate the sum of two numbers until a particular variable becomes true. In this case, you already know you want to repeat a block of code 10 times. For example, you want to calculate the sum of two numbers ten times. While executing the loops, you might or might not be aware of the number of times you want to execute a set of instructions. So, how will you decide which looping statement to use for your need? Some of the VBScript looping statements are Do While, Do Until, ForвЂ¦.Next and so on.

There are a number of VBScript looping statements. Loops are used to execute the same block of code again and again.