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The while statement is used for repeated execution as long as an expression is true:
| while_stmt | ::= | "while" expression ":" suite |
["else" ":" suite] |
This repeatedly tests the expression and, if it is true, executes the first suite; if the expression is false (which may be the first time it is tested) the suite of the else clause, if present, is executed and the loop terminates.
A break statement executed in the first suite terminates the loop without executing the else clause's suite. A continue statement executed in the first suite skips the rest of the suite and goes back to testing the expression.
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