C Program to display Prime Numbers between two numbers

Published on December 18, 2016 by Senthil Kumar

Filed under C

Last modified December 18, 2016

Print this page

rate 1 star rate 2 star rate 3 star rate 4 star rate 5 star
Your rating: none, Average: 0 (0 votes)

This article have been viewed 5600 times


Write a program in C to display all the prime numbers between a range of 2 numbers.

How to display prime numbers between a range of 2 numbers in C ?

#include <stdio.h>
int main()
    int lowerlimit, upperlimit, index, flag;
    printf("Abundantcode.com coding sample\n");
    printf("Enter Lower limit :");
    scanf("%d", &lowerlimit);
    printf("Enter Upper limit :");
    scanf("%d", &upperlimit);

    printf("Prime numbers between %d and %d : ", lowerlimit, upperlimit);

    while (lowerlimit < upperlimit)
        flag = 0;

        for(index = 2; index <= lowerlimit/2; ++index)
            if(lowerlimit % index == 0)
                flag = 1;

        if (flag == 0)
            printf("%d ", lowerlimit);


    return 0;


Abundantcode.com coding sample  
Enter Lower limit :5

Enter Upper limit :20      
Prime numbers between 5 and 20 : 5 7 11 13 17 19

Leave a Comment


You might be Interested in these Posts

C Program to convert lower case string to upper case

Problem Statement Write a program in C to convert the given string from lower case to upper case. ...

How to decode a base64 string in C#?

Here's a sample code snippet demonstrating how you can easily decode a base64 encoded string in C#. ...

How to disable editing of items in a combo box in c#?

When working in Win forms using C# and especially when you use the combo box , you would have notice...