Answer Posted / d.sukumar

void main()
{
int i,k;int count=0;
int n;
printf("enter a no");
scanf("%d",&n);
for(i=2;i<=n;i++)
{
k=n%i;
if(k==0)
{
count++;
}
}
if(count==1)
printf("prime");
else
printf("not prime");
}

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