Lokesh Kumar in C languageProgramming

31-Write a C program to display whether number is prime or not.

Program: 31

Write a C program to display whether number is prime or not.

#include #include void main() { int num, i=2; printf("Enter a number: "); scanf("%d", &num); while(i<=num-1) { if(num%i==0) { printf("%d is not a prime number.", num); break; } i++; } if(i==num) printf("%d is a prime number.", num); getch(); }
Output
`Enter a number: 435` `435 is not a prime number.`

#include
#include
void main()
{
    int num, i=2;
    printf("Enter a number: ");
    scanf("%d", &num);
    while(i<=num-1)
    {
        if(num%i==0)
        {
            printf("%d is not a prime number.", num);
            break;
        }
        i++;
    }
    if(i==num)
       printf("%d is a prime number.", num);
    getch();
}

Output

Enter a number: 435

435 is not a prime number.

Next Read: 32-Write a C program to display whether number is prime or not (while-loop). »

Programs

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Program: 31

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