switch statement

switch statement :

                                Whenever we want to check more possible conditions for a single variable a no. of statements are necessary. C has a built-in multiway decision statement known as a “ switch “ statement. The switch statement tests the value of a given expression against a list of case values and when a match is found, a block of statements associated with that case is executed.

                                In switch case statement, no case can have two equal values. Default may appear at any place and not compulsory. The flowchart and syntax of switch statement is shown below :

     

       

  Syntax :                 switch(expression)

                                                 {

                                                        case value-1:block-1;

                                                                                   break;

                                                        case value-2:block-2;

                                                                                   break;

                                                        case value-3:block-3;

                                                                                   break;

 

                                                         case value-n:block-n;

                                                                                   break;

                                                          default        :block n+1;

                                                 }

                                                 statement-x;

                        Ex:

                                                 #include<stdio.h>

                                                 #include<conio.h>

                                                 void main()

                                                 {

                                                      int a,b,c,choice;

                                                      clrscr();

                                                    printf(“Enter values of a and b:”);

                                                    scanf(“%d%d”,&a,&b);

                                                    printf(\n1.ADDITION\n2.SUBTRACTION\n3.MULTIPLICATION\n4.DIVISION

                                                                                \n5.MODULo DIVISION”);

                                                    printf(“\n select ur choice:”);

                                                    scanf(“%d”,&choice);

                                                    switch(choice)

                                                    {

                                                           case 1:c=a+b;

                                                                                break;

                                                           case 2:c=a-b;

                                                                                break;

                                                            case 3:c=a*b;

                                                                                break;

                                                            case 4:c=a/b;

                                                                                break;

                                                            case 5:c=a%b;

                                                                                break;

                                                            default:printf(“\n Enter only a valid choice”);

                                                    }

                                                    printf(“\nResult is = %d”,c);

                                                    getch();

                                                 }