C Program to Check Whether a Number is Even or Odd

/* C Program to check whether the input integer number 
    is even or odd using if else or the modulus operator (%)
 */
#include<stdio.h>
#include<conio.h>
void main()
{
    int x;   // This variable X is to store the input number 
    printf("Enter a number\n");
    scanf("%d",&x);
    if(x%2==0)   // Modulus (%) returns remainder
        printf("Even number");
    else
        printf("Odd number");
    getch();
}

Enter a number
187
odd number

/* C Program to check if number is even or odd
   using bitwise operator
 */
#include<stdio.h>
#include<conio.h>
void main()
{
    int N;
    printf("Enter a number\n");
    scanf("%d",&N);
    // If N & 1 is true 
    if(N&1)
        printf("Odd number");
    // Otherwise 
    else
        printf("Even number");
    getch();
}

Enter a number
18
Even number

/* C Program to check if number is even or odd
    without using bitwise or modulus operator
 */
#include<stdio.h>
#include<conio.h>
void main()
{
    int Num;
    printf("Enter a number\n");
    scanf("%d",&Num);
    // If (Num/2)*2==Num is true 
    if((Num/2)*2==Num)
        printf("Even number");
    // Otherwise 
    else
        printf("Odd number");
    getch();
}

Enter a number
157
Odd number

/* C Program to check whether the input integer number
    is even or odd Using the Ternary Operator or conditional operator
 */
#include<stdio.h>
#include<conio.h>
void main()
{
    int num;   // This variable X is to store the input number
    printf("Enter a number\n");
    scanf("%d",&num);
   num%2==0?printf("Even number"):printf("Odd number");
    getch();
}

Enter a number
1211
Odd number

/* C Program to check whether the input integer number
    is even or odd Using function
 */
#include<stdio.h>
#include<conio.h>
void iseven(int num)
{
 if(num%2==0)
        printf("Even number");
 else
        printf("Odd number");
}
void main()
{
    int x;   // This variable X is to store the input number
    printf("Enter a number\n");
    scanf("%d",&x);
    iseven(x);
    getch();
}