# C program to make prime numbers or check prime numbers

### C program to make prime numbers or check prime numbers

Problem 1:
Write a  C program to check if the number is prime or not.
Solution:
logic for being a prime number:
C Code for check if the number is prime or not:

``#include <stdio.h>int main(){   int n, c = 2;    printf("Enter a number to check if it is prime = n");   scanf("%d",&n);    for ( c = 2 ; c <= n - 1 ; c++ )   {      if ( n%c == 0 )      {        printf("%d is not prime.n", n);     break;      }   }   if ( c == n )      printf("%d is prime.n", n);    return 0;}``
Run Code for check if the number is prime or not in Live [Give input 12 or 19 to check]:
Problem 2:
Write a  C program to generate number of prime numbers.
C code for generate number of prime numbers:

``#include <stdio.h>int main(){   int n, i = 3, count, c;    printf("Enter the number of prime numbers requiredn");   scanf("%d",&n);    if ( n >= 1 )   {      printf("First %d prime numbers are :n",n);      printf("2n");   }    for ( count = 2 ; count <= n ;  )   {      for ( c = 2 ; c <= i - 1 ; c++ )      {         if ( i%c == 0 )            break;      }      if ( c == i )      {         printf("%dn",i);         count++;      }      i++;   }    return 0;}``

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C program to make prime numbers or check prime numbers, C program to generate prime, prime number generating, C code,  c programming examples, c codes, prime number algorithm