While Loop
A while loop statement in C programming language repeatedly executes a target statement as long as a given condition is true.
Syntax
while (expression) statement
If expression is true, statement will be executed and then expression will be re-evaluated to determine whether or not to execute statement again. It is possible that statement will never execute if expression is false when it is first evaluated
Example
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int i = 0; //loop counter initialized outside of loopwhile (i < 5) // condition checked at start of loop iterations{ printf("Loop iteration %d\n", i++); //(i++) Loop counter incremented manually inside loop} |
The expected output for this loop is:
Loop iteration 0
Loop iteration 1
Loop iteration 2
Loop iteration 3
Loop iteration 4
Unlike a for loop, the expression must always be there. while loops are used more often than for loops when implementing an infinite loop, though it is only a matter of personal choice.
Infinite Loops
A while loop with expression=1 can execute indefinitely (can leave loop via break statement)
