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29 sie 2012 · When designing a loop, think about when the leave-checking should be done; if you want to read from a possibly empty file, it makes sense to check early: Do Until tsIn.AtEndOfStream sLine = tsIn.ReadLine() ... Loop but if you want to get valid input from the user, you have to ask before you can check: Do sInp = ... Loop While isBad(sInp)
26 wrz 2024 · Do 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.
You can use the Until keyword in two ways to check a condition in a Do...Loop statement. You can check the condition before you enter the loop (as shown in the following ChkFirstUntil example), or you can check it after the loop has run at least once (as shown in the ChkLastUntil example).
The keyword Until will continue the loop as long as condition is False. If no condition is specified, the loop will repeat indefinitely or until an Exit Do is encountered. Examples
Loops are used in programming to execute a block of code repeatedly until a specified condition is met. In this tutorial, you will learn to create while and do...while loop in C programming with the help of examples.
29 wrz 2022 · Use a Do...Loop structure when you want to repeat a set of statements an indefinite number of times, until a condition is satisfied. If you want to repeat the statements a set number of times, the For...Next Statement is usually a better choice.
Visual Basic has three main loop structures and in this second instalment we will look at the Do While’s cousin, the Do Until loop. To recap, a loop allows will execute a block of code a number of times until a condition is met. They typically look as follows. Start loop Code End loop when some condition is met.
