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@arraytools arraytools/primer.c
Created Feb 24, 2019

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#include <stdio.h>
int checkPrimeNumber(int n);
int main()
int n1, n2, i, flag;
printf("Enter two positive integers: ");
scanf("%d %d", &n1, &n2);
printf("Prime numbers between %d and %d are: ", n1, n2);
for(i=n1+1; i<n2; ++i)
// i is a prime number, flag will be equal to 1
flag = checkPrimeNumber(i);
if(flag == 1)
printf("%d ",i);
return 0;
// user-defined function to check prime number
int checkPrimeNumber(int n)
int j, flag = 1;
for(j=2; j <= n/2; ++j)
if (n%j == 0)
flag =0;
return flag;
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