C – Switch Case

Switch:

• It is a conditional statement that executes specific set of statements(case) based on given choice.
• Default case executes if the user entered invalid choice.
• Case should terminate with break statement.

Syntax:

switch(choice)
{
	case 1 :  Statements ;
		  break
	case 2 :  Statements ;
		  break
	......

	case n :  Statements ;
		  break
	default: Statements ;
}

FlowChart:

#include<stdio.h> int main(){             char ch;             printf(“Enter character(r, g, b) : “);             scanf(“%c”, &ch);             switch(ch)             {                         case ‘r’ :            printf(“Red \n”);                                                 break;                         case ‘g’ :           printf(“Green \n”);                                                 break;                         case ‘b’ :           printf(“Blue \n”);                                                 break;                         default :          printf(“Unknown \n”);             }             return 0; }

Program to perform arithmetic operations based on given choice:

#include<stdio.h> int main() {             int a, b, c, ch;             printf(“Arithmetic Opeations”);             printf(“1.Add \n”);             printf(“2.Subtract \n”);             printf(“3.Multiply \n”);             printf(“4.Divide \n”);                         printf(“Enter your choice : “);             scanf(“%d”,&ch);                         if(ch>=1 && ch<=4)             {                         printf(“Enter 2 numbers : \n”);                         scanf(“%d%d”, &a, &b);             }               switch(ch)             {                         case 1: c=a+b;                         printf(“Add result : %d\n”, c);                         break;                                                 case 2: c=a-b;                                     printf(“Subtract result : %d\n”, c);                                     break;                                                 case 3: c=a*b;                                     printf(“Multiply result : %d\n”, c);                                     break;                                                  case 4: c=a/b;                                     printf(“Division result : %d\n”, c);                                     break;                                                 default:printf(“Invalid choice\n”);                     } }