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30. Write the program to find prime numbers.

Answer:

int n;
int a=0;
scanf("%d",&a);
n=a;
while (n>2)
{
if(n%2!=0)
{
n=n/2;
if (n>=2)
{
printf("%d is prime number", a);
break;
}
}
else
{
printf("%d is not prime number", a);
break;
}

}

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