The C Programming language Chapter 5 Control Flow Switch statement switch( expr i case El: statement I; break case E2: statement 2: break case En: statement n: break Default: statement; break; I switch expression case El E E default statement statement2 statement statementThe C Programming Language Chapter 5 Control Flow ➢ flowchart ❖ Switch statement ➢ switch ( expr ) { case E1: statement 1; break ; case E2 : statement 2; break; ……. case En : statement n; break; [default: statement ;break;] } Notice: ⚫E1,E2,…En must be constant expressions,and must be different; ⚫Cases serve just as labels,the break statements causes an immediate exit from the switch ; ⚫Switch can be nested ; ⚫Statements after case having no { } is all right; ⚫Several cases can use the same statements. as： …… case ‘A’: case ‘B’: case ‘C’: printf(“score>60\n”); break; …….. switch expression statement1 statement2 …... statement n statement E 1 E 2 En default case