Program to print even or odd numbers in given range using recursion

Program to print even or odd numbers in a given range using recursion in C language

In this tutorial, we will discuss a concept of the  C program to print odd or even number in given range using recursion

In this article, we are going to learn  how to  print odd and even numbers using recursion in the C programming language

What is an even or odd number?

When any integer ends in 0,2,4,6,8 and it can be divided by two with the remainder of zero, it is called as an even number.

Example of even numbers – 34,-64,78,788

When any integer ends in 0,1,3,5,7,9 and it cannot be divided without a remainder, it is called as an odd number.

Example for odd numbers – 33,-69,75,785

Here, We can use C programming operators to find odd or even number in the given range

C program to find odd or even number using recursion

Program 1

This program allows the user to enter two input(number) for the lower limit and upper limit. and  it finds whether odd and even numbers in the given range(between upper limit to lower limit)

#include <stdio.h>
#include <stdlib.h>
void displayEvenOdd(int num, int limit);
int main()
{
    int lowerLimit, upperLimit;
    printf("Enter lower limit\n");
    scanf("%d",&lowerLimit);  
//Received from user number for lower limit
    printf("Enter upper limit\n");
    scanf("%d",&upperLimit);
//Received from user number for upper limitr
    printf("Even/odd numbers from %d to %d are: ",lowerLimit,upperLimit);
    displayEvenOdd(lowerLimit,upperLimit);
    getch();
    return 0;
}

void displayEvenOdd(int num, int limit)//recursive function
{
    if(num>limit)
        return;
    printf("%d, ",num);

    displayEvenOdd(num + 2, limit);
}

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

case 1

Enter lower limit
10
Enter upper limit
30
Even/odd numbers from 10 to 30 are: 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30

case 2

Enter lower limit
5
Enter upper limit
25
Even/odd numbers from 5 to 25 are: 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25

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