A C program to check whether a number is prime number or not.

// A C program to check whether a number is prime number or not

#include<stdio.h>

#include<conio.h>

void main()

{

int num,i,Prime=0;

printf("Enter a positive number\n");

scanf("%d",&num);

for(i=2;i<=(num/2);++i)

{

if(num%i==0)

{

Prime=1;

break;

}

}

if(Prime==0)

printf("%d is a Prime Number",num);

else

printf("%d is NOT a Prime Number",num);

getch();

}

Output:

// A program to print the name 10 times.
//A C program to print ODD numbers from 1 to N using while loop.

//A C program to print ODD numbers from 1 to N using for loop.