Break and continue
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The break and continue statements can be used to control the flow of loops in C programming. - The break statement causes immediate exit from a loop. Program execution continues after the loop. It is commonly used to escape early from a loop or skip the remainder of a switch structure. - The continue statement skips the remaining statements in the body of a loop for that iteration and proceeds with the next iteration. In a while or do-while loop, the continuation test is evaluated immediately after continue. In a for loop, the increment expression is executed before the continuation test. - An example shows using continue in a for loop to skip printing the value 5 and proceed to the next iteration of the loop.
Break and continue
- 1. The break and continue Statements • break – Causes immediate exit from a while, for, do/while or switch structure – Program execution continues with the first statement after the structure – Common uses of the break statement • Escape early from a loop • Skip the remainder of a switch structure
- 2. The break and continue Statements (II) • continue – Skips the remaining statements in the body of a while, for or do/while structure • Proceeds with the next iteration of the loop – while and do/while • Loop-continuation test is evaluated immediately after the continue statement is executed – for structure • Increment expression is executed, then the loop-continuation test is evaluated
- 3. 1 /* Fig. 4.12: fig04_12.c 2 Using the continue statement in a for 3 #include <stdio.h> structure */ 4 5 int main() 6 { 7 int x; 8 9 for ( x = 1; x <= 10; x++ ) { 10 11 if ( x == 5 ) 12 continue; /* skip remaining code in 13 if x == 5 */ loop only 14 15 printf( "%d ", x ); 16 } 17 18 printf( "nUsed continue to skip printing 19 return 0; the value 5n" ); 20} 1 2 3 4 6 7 8 9 10 Used continue to skip printing the value 5 2000 Prentice Hall, Inc. All rights Outline 1. Initialize variable 2. Loop 3. Print Program Output
- 4. The break Keyword Continuation condition? true Statement(s) break Statement(s) Next Statement false
- 5. break // Using break to exit a loop (break.c). #include <stdio.h> main() { int i; for(i=0; i<100; i++) { if(i == 10) break; // terminate loop if i is 10 printf("i: %d n", i); } printf("Loop complete."); }