C PRO 21 : WAP to find whether the given number is a prime number.

 

//Program

# include <stdio.h>

void main()

{

int n,x;

printf("Enter the number for testing(prime or not):");

scanf("%d",&n);

for(x=2;x<n;x++)

{

if(n%x==0)

{

printf("%d is not a prime number",n);

exit(0);

}

}

printf("%d is a prime no",n);

}

// PRIME NUMBER SERIES

# include <stdio.h>

void main()

{

int i,j,lim,count=0;

printf("Enter the limit : ");

scanf("%d",&lim);

printf("Prime Numbers from 1 to %d are : \n",lim);

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

{

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

{

if(i%j==0)

{

count++;

break;

}

}

if(count==0 && i!=1)

            printf("%d ", i);

        count = 0;

}

return 0;

}

**Author**

Sukhvir Singh

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