#161 in C

All about loops in C

Notes

notes

While Loops

The while construct has a guard condition tested on entry to loop:

while (condition) {
  statements;
}

Do-While Loops

The do .. while construct has the guard condition tested at the end of the loop:

do {
  statements;
} while (condition);

For loop

The for construct is a super-charged while loop, with embedded initialization and stepping of the loop control variable:

for (initial value; condition; incrementation or decrementation )  {
  statements;
}

Break Statement

A break statement in a loop will immediately exit the loop.

Continue Statement

A continue statement in a loop will immediately end the current loop and skip to the next iteration.

Running the Examples

See example.c for details. It runs simple tests of all combinations of syntax. A makefile compiles and runs:

$ make
gcc -Wall -O0    example.c   -o example
./example

===== test_while

===== test_break_while

===== test_continue_while

===== test_do_while

===== test_break_do_while

===== test_continue_do_while

===== test_for

===== test_break_for

===== test_continue_for

Credits and References

C Loops: For, While, Do While, Looping Statements with Example

Project Notes