Program Control: Repetition

Repetition Definition

Repetition means one or more instruction repeated for a certain amount of time. Repetitions can be predefined in the program or can be defined later at run time

examples of repetition/looping operation: for, while, and do-while.

The C programming language still features the old fashioned go to command but is rarely used due to it being used resulting in a messed up code or in other words spaghetti code.

FOR

the for command syntax is

for(initialization; conditional; increment or decrement){

          statement1;

          statement2;

WHILE

the while command syntax is

while (exp){

       statement1;

       statement2;

}

the exp is a boolean expression meaning will only result to true or false. Statement will be executed while exp is true. The exp evaluation is done before the statements executed.

DO-WHILE

the do-while command syntax is

do{

    statements;

} while(exp);

this command will keep executing while exp is true. The exp evaluation is done after executing the statement(s)

BREAK AND CONTINUE

break is used to end a loop operation or to end the switch operation

continue is used to skip a loop statements once and continue to the next loop operation