Thursday, November 29

To Check The Number Is Even Or Odd



Write a C program to check whether the given number is even or odd.

Program:

#include <stdio.h>
int main() 
{
int a;
printf("Enter a: \n");
scanf("%d", &a);

if (a % 2 == 0) 
   {
          printf("The given number is EVEN\n");
    }
else 
  {
          printf("The given number is ODD\n");
   }
return 0;
}


Output:

Enter a number : 2
The given number is EVEN

Explanation with examples:

Example 1: If entered number is an even number
Let value of 'a' entered is 4
if(a%2==0) then a is an even number, else odd.
i.e. if(4%2==0) then 4 is an even number, else odd.
To check whether 4 is even or odd, we need to calculate (4%2).
/* % (modulus) implies remainder value, Therefore if the remainder obtained when 4 is divided by 2 is 0, then 4 is even. */
4%2==0 is true
Thus 4 is an even number.

Example 2: If entered number is an odd number.
Let value of 'a' entered is 7
if(a%2==0) then a is an even number, else odd.
i.e. if(7%2==0) then 4 is an even number, else odd.
To check whether 7 is even or odd, we need to calculate (7%2).
7%2==0 is false
 /* 7%2==1 condition fails and else part is executed */
Thus 7 is an odd number.