The flowchart

Here's what the flowchart for a repetitive construct looks like,

Remember that in a flowchart you move along the lines in the direction of the arrows. So in this flowchart we enter and begin at the test expression which we evaluate. The test expression will be the same kind of relational expression we used in if statements earlier. If the expression evaluates to True we execute the statement, and then return to the text expression and reevaluate it. If it is still True we execute the statement again and return yet again to the test expression. This looping continues as long as the text expression remains True. But as soon as the test expression is False the statement is skipped and execution continues below it in the program.

N.B. the statement need not be a simple statement, it may be a compound statement consisting of many simple statements including other repetition constructs.