They each execute instructions repeatedly until a condition is met that prevents further execution, but programmers must make sure the loops’ end conditions are met. Javascript while loops and do-while loops are basic Javascript control structures similar to for loops. the break outerloop causes execution to continue here Conclusion This expression, called the end condition, determines when the while loop should stop executing the instructions in its code block.Ī while loop looks like this: while (condition) Javascript While LoopsĪ Javascript while loop always starts with the keyword while followed by an expression in parentheses. This article also covers some caveats when using either of those loops. In this article, we define what a Javascript while loop is and how it differs from the do-while loop. Although they have similar functions, important differences between them make them useful in slightly different circumstances. The Javascript standard specifies two different types of while loops: the simple while loop and the do-while loop. While loops are part of a programming statement class called “control statements,” since they influence the logical flow of a program. The Javascript while loop is a programming construct that executes a set of statements as long as a certain condition is true.
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