A Switch is a control statement that allows value to change control of execution.
These are the fact about the switch statement.

• Switch case statement expressions must be of integral type (int,char and enum). Any other type of expressions used in switch case are not allowed.

• Until a break statement is encountered ,all the above matching statements get executed.

• We can place the default block anywhere .

• The labels used by integral expression should be a constant expressions.

• The statement of switch cases written above are never executed.

• The same values should not consist in any two case labels.

Simple Program to explain the syntax of switch

#include
int main()
{
int  m=2;
switch(m)
{
case 1: printf(Color is 1);
            break;
case 2: printf(Color is 2);
            break;
case 3: printf(Color is 3);
            break;
default: printf(Color other than 1, 2 and 3);
            break;
}
return );
}

Output for the above program

Color is 2