C Switch Statement

We use the switch statement to select from multiple choices that are identified by a set of fixed values for a given expression. The expression that selects a choice must produce a result of an integer type other than long, or a string, or a value of an enumeration type. Thus, the expression that controls a switch statement can result in a value of type char, int, short, long, string, or an enumeation constant.

C switch Syntax And Facts

• A switch statement is an alternative to if-else-if statement.
• The switch statement has four important elements.
• The test expression
• The case statements
• The break statements
• The default statement

C Switch Syntax

Syntax Switch Statement

switch ( variable )
{
case value1:
statement;
break;
case value2:
statement;
break;
default:
statement;
}

Switch Statement Flowchart

The following flowchart clearly illustrate how switch statement works

C Switch Statement Program

Let's take a look at the switch statement in action. In the following program we will greet either dad or mom or yourself.

#include <stdio.h>
int main()
{
int choice;
printf("Press 1 to greet your dad\n ");
printf("Press 2 to greet your mom\n ");
printf("Press 3 to greet yourself\n ");
scanf("%d ",&choice);
switch (choice)
{
case 1:
printf("\nHello dad,How are you? ");
break;
case 2:
printf("\nHello mom,How are you? ");
break;
case 3:
printf("\nHello awesome,How are you? ");
break;
default:
printf("\nInvalid choice ");
}
return 0;
}

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