2007-08-30 |  RatheeshTR  | Viewed: 448  |    0

The break Statement:

We have already met break in the discussion of the switch statement. It is used to exit from a loop or a switch, control passing to the first statement beyond the loop or a switch.

With loops, break can be used to force an early exit from the loop, or to implement a loop with a test to exit in the middle of the loop body. A break within a loop should always be protected within an if statement which provides the test to control the exit condition.

for example:
    int a = 0; // loop through all numbers 0-99

    while (a < 5) // get user input
    {
        if (a == 0) // if invalid inpu t
            continue; // go back and try again

        // do some thing here

            break; // exit loop, because we’re done
    }


Example program:

1. Break Statement

---

Continue Statement:

This is similar to break but is encountered less frequently. It only works within loops where its effect is to force an immediate jump to the loop control statement.

• In a while loop, jump to the test statement.
• In a do while loop, jump to the test statement.
• In a for loop, jump to the test, and perform the iteration.

Like a break, continue should be protected by an if statement. You are unlikely to use it very often.

    int value =0;
    for (index=0 ;index < 10;index++ )
    {
        if (index==4 || index==5)
            continue;
        value += numbers[index];
    }
    printf("Value = %i",value) ;

eg,

     for ( i = 0 ; i < n ; i++ )   {
            if ( a[i]  <  0 )               /*  skip negative elements  */
                 continue;
         /*  do positive elements  */
     }