C Programming language

# switch statement

The switch statement allows you to select from multiple choices based on a set of fixed values for a given expression. Switch statement is used to switch the multiple choices.

It has a built in multiple - branch structure and work similar to if else ladder generally. The input value to to the switch statement construct is a int or char variable. Note that no float or any other data is allowed. This input variable is compared against a group of integer constant.

All the statements in and after the case in which there is a match is executed until a break statement is encountered or end of switch is reached. We are also allowed to give a default case which will be executed if no other statement match is found.

switch(expression){
case value1: /* execute unit of code 1 */
break;
case value2: /* execute unit of code 2 */
break;
...
default: /* execute default action */
break;
} 

All the statements in and after the case in which there is a match is executed until a break statement is encountered or end of switch is reached. We are also allowed to give a default case which will be executed if no other statement match is found.

Syntax

switch (integer expression)
case 1:
do this;
case2:
do this;
//default :do this;
} 

#include <stdio.h>
int main (void)
{
	char ch;
	printf ("\nEnter Character x,y or z: ");
	ch = getchar ();
	switch (ch)
	{
		case 'x' : printf ("You Entered x");
				 break;
		case 'y' : printf ("You Entered y");
				 break;
		case 'z' : printf ("You Entered z");
				 break;
		default : printf ("You Didnot Entered x, y or z");
	}
	return 0;
}