How to print prime numbers in C language program?

Answer 1

#include <stdio.h> void main() { int n,i=1,j,c; clrscr(); printf("Enter Number Of Terms"); scanf("%d",&n);

printf("Prime Numbers Are Following");

for(i=1;i<=n;i++)

{ c=0; for(j=1;j<=i;j++) { if(i%j==0) c++; } if(c==2) printf("%d",i); } getch(); }

Answer 2

#include <stdio.h>

int main(int, char*) {

int i, j, breakflag;

for (i = 2; i <= 100; ++i) {

breakflag = 0;

for (j = 2; j < i; ++j) {

if (i % j == 0) {

breakflag = 1;

break;

}

}

if (!breakflag) printf ("%d ", i);

}

printf ("\n");

return 0;

}

Answer 3

It is type-dependent:

for 'int': printf ("%d", prime);

for 'long': printf ("%ld", prime);

for 'long long': printf ("%lld", prime);