C function to check a number is even or odd

In this tutorial, we will discuss the C function to check a number is even or odd

In this program, we are going to learn about how to find odd or even number from given number using function in C language

First, we must understand what is even or odd?

What is Even or Odd

When the number is divided by 2 and the balance becomes zero. the above number is called as the even number – eg 2,4,6,8,10

and on the other sides when it is divided by 2 and balance becomes 1 they are called odd numbers or uneven numbers

In my previous post, I have explained the various ways to check whether the number is even or odd in C language

we can embed the logic of the program to check even or odd numbers using any of the following approaches in a function

here, I have explained how to embed in the function and how to check even number or odd number of the given number

Once This program received the number it will check the given number either odd or even using the function.

After receiving the input from the user, it is stored in the variable named num and then the program divides the value of num by 2 and displays the output

Check a number is even or odd using Modular operator

Program 1

#include 
#include 

int find_Num(int);//function prototype
int main()
{
    int num;
    printf("Enter a number to check odd or even\n");
    scanf("%d",&num);
    find_Num(num);//calling the function
    getch();
    return 0;
}

//create function
int find_Num(int num){//function definition
if(num%2==0){
    printf("\n%d is an even number",num);
}
else{
    printf("\n%d is an odd number",num);
}

}

When the above code is executed, it produces the following results

Case 1

Enter a number to check odd or even
46

46 is an even number

Case 2

Enter a number to check odd or even
17

17 is an odd number

Program 2

Check a number is even or odd using modular with the return

#include 
#include 
int find_Num(int);//function prototype
int main()
{
    int num;
    printf("Enter a number to check odd or even\n");
    scanf("%d",&num);
    if(num%2==0){
    printf("\n you entered number %d is a even number",num);
}
else{
    printf("\nyou entered number %d is a odd number",num);
}
    find_Num(num);//calling the function
    getch();
    return 0;
}

//create function
int find_Num(int num){//function definition
     return(num%2==0);//return value
}

When the above code is executed, it produces the following results

Case 1

Enter a number to check odd or even
34

you entered number 34 is a even number

Case 2

Enter a number to check odd or even
45

you entered number 45 is a odd number

Check a number is even or odd using the function with conditional operator

#include 
#include 
int oddEvenNum(int);//function prototype
int main()
{
    int num;
    printf("Enter an integer number: ");
scanf("%d",&num);
    oddEvenNum(num);//calling the function
    getch();
    return 0;
}

//create a function
int oddEvenNum(int num){//function definition

(num%2==0) ? printf("%d is an even",num):
    printf("%d is an odd",num);

}

When the above code is executed, it produces the following results

Case 1

Enter an integer number
16

16 is an even

Case 2

Enter an integer number
57

57 is an odd

Check a number is even or odd using the function with Bitwise operator

#include 
#include 
int oddEvenNum1(int);//function prototype
int main()
{
    int num;
    printf("Enter an integer number: ");
scanf("%d",&num);

    oddEvenNum1(num);//calling the function
    getch();
    return 0;
}
int oddEvenNum1(int num){//function definition

if(num&1)
    printf("%d is an odd number",num);
else
    printf("%d is an even number",num);
}

When the above code is executed, it produces the following results

Case 1

Enter an integer number:
786

786 is an even number

Case 2

Enter an integer number:
89

89 is an odd number

Check a number is even or odd using the function with Division operator

#include 
#include 
int find_Evenodd(int);//function prototype
int main()
{
    int num;
    printf("Enter a number for find odd or even\n");
    scanf("%d",&num);
find_Evenodd(num);//calling the function
    getch();
    return 0;
}

//Create function
int find_Evenodd(int num){//function definition
if((num/2)*2==num)
    printf("%d is an even",num);
else
    printf("%d is an odd",num);


}

When the above code is executed, it produces the following results

Case 1

Enter a number for find odd or even
87

87 is an odd

Case 2

Enter a number for find odd or even 
106
106 is an even

Check a number is even or odd using the function with Shift operator

#include 
#include 
int find_Evenodd(int);//function prototype
int main()
{
    int num;
    printf("Enter a number for find even or odd\n");
    scanf("%d",&num);
find_Evenodd(num);//function call
    getch();
    return 0;
}
int find_Evenodd(int num){//function definition
if(((num>>1)<<1)==num ){
        printf("%d is an even number ",num );
               }
else{
        printf("%d is an odd number ",num );
               }


}

When the above code is executed, it produces the following results

Case 1

Enter a number for find even or odd
901

901 is an odd number

Case 2

Enter a number for find even or odd
1060
1060 is an even number

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