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The general form of the for statement can be expressed as follows: When using this version of the for statement, keep in mind that: 1  The initialization expression initializes the loop; it's executed once, as the loop begins. 2  When the termination expression evaluates to false, the loop terminates.
Because the test of the while expression takes place before each execution of the loop, a while loop executes zero or more times. This differs from the do loop, which executes one or more times. A while loop can be terminated when a break, goto, return, or throw statement transfers control outside the loop.To pass control to the next iteration without exiting the loop, use the continue statement.ecause the test of the while expression takes place before each execution of the loop, a while loop executes zero or more times. This differs from the do loop, which executes one or more times. A while loop can be terminated when a break, goto, return, or throw statement transfers control outside the loop.