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The while loop is simpler than the for loop:
while (condition) body_statement |
The body_statement — very oten a compound statement enclosed in curly braces — executes over and over until the condition becomes false. If the condition is false to begin with, body_statement never executes.
Occasionally, you want the body_statement to execute and set the condition before it is tested for the first time. In this case, use the do while statement:
do {
body_statement_A;
body_statement_B;
...etc...
} while (condition);
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