P-43.c

//Write a program in c to check whether a number is prime or composite.
#include<stdio.h>
int main()
{
int n,m,a=0;
printf("Enter a number:");
scanf("%d",&n);
m=n/2;
for(int i=2;i<=m;i++)
{
if(n%i==0)
{
printf("%d is not a prime number",n);
a=1;
break;
}
}
if(a==0)
{
printf("%d is a prime number",n);
}
}