C Conditional Operators

Conditional Operators [ ?: ] are also called as Ternary Operator .

Syntax :

expression 1 ? expression 2 : expression 3

where

• expression1 is Condition
• expression2 is Statement Followed if Condition is True
• expression2 is Statement Followed if Condition is False

 Explanation:

1. Expression1 is a Boolean Condition i.e it results into either TRUE or FALSE
2. If result of expression1 is TRUE then expression2 is Executed.
3. Expression1 is said to be TRUE if its result is NON-ZERO.
4. If result of expression1 is FALSE then expression3 is Executed.
5. Expression1 is said to be FALSE if its result is ZERO. 

Example : Check whether Number is Odd or Even 

#include<stdio.h>

int main()
{
  int num;
  printf("Enter the Number : ");
  scanf("%d",&num);
   if(num%2==0)
    printf("\nNumber is Even");
   else
    printf("\nNumber is Odd");
 }

We can write this program as –

#include<stdio.h>

int main()
{
  int num;
  printf("Enter the Number : ");
  scanf("%d",&num);
 (num%2==0)?printf("\nNumber is Even"):printf("\nNumber is Odd");
 }

Note :

Operator that works on 3 operands is called as tertiary operator.