C program to find the prime numbers between a range using while loop

Program to find the Prime numbers between a Range using While loop

Prime number is an Integer number. The Prime number can be divisable by 1 and the number itself. If a number has more positive divisors other than 1 and the number itself, then the number is not Prime number. For example: 2, 3, 5, 7, 11, 13, 17  . . . are Prime numbers. The below given C program to find the prime numbers between a range using while loop. Kindly check out the program to display the prime numbers between a range.


Program to display the prime numbers using while loop


#include<stdio.h>

int main(){

    int numbr,k,remark,first,last;

    printf("Give the First Number for the Range : ");
    scanf("%d",&first);
    printf("\n Give the Last Number for the Range : ");
    scanf("%d",&last);

    numbr= first;

    while(numbr<= last)

   {

    remark=0;

    k=2;

    while(k<=numbr/2)

   {

        if((numbr % k) == 0){

        remark++;

        goto jump;

        }

   k++;

    }

   if(remark==0)

   printf("\n    %d ",numbr);

   jump:

   ++numbr;

   }

   return 0;

}

 


Sample output:

Give the First Number for the Range :  20

Give the Last Number for the Range  :  40

 

         23

         29

         31

         37 


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