A menu driven program that I wrote using C language to solve the factorial, prime numbers, and odd and even numbers.
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My email address is the following jakerpomperada@gmail.com, jakerpomperada@aol.com, and jakerpomperada@yahoo.com.
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Program Listing
#include<stdio.h>
#include <stdlib.h>
int main()
{
printf("\n\n\t\tLearning Math in C\n");
printf("\nCreated By Mr. Jake R. Pomperada,MAeD-IT,MIT\n\n\n");
int choice, num, i;
unsigned long int fact;
while(1)
{
printf("1. Factorial \n");
printf("2. Prime\n");
printf("3. Odd\\Even\n");
printf("4. Exit\n\n\n");
printf("Enter your choice : ");
scanf("%d",&choice);
switch(choice)
{
case 1:
printf("Enter number:\n");
scanf("%d", &num);
fact = 1;
for(i = 1; i <= num; i++)
{
fact = fact*i;
}
printf("\n\nFactorial value of %d is = %lu\n\n\n",num,fact);
break;
case 2:
printf("Enter number:\n");
scanf("%d", &num);
if(num == 1)
printf("\n1 is neither prime nor composite\n\n");
for(i = 2; i < num; i++)
{
if(num%i == 0)
{
printf("\n%d is not a prime number\n\n", num);
break;
}
}
/*
Not divisible by any number other
than 1 and itself
*/
if(i == num)
{
printf("\n\n%d is a Prime number\n\n", num);
break;
}
case 3:
printf("Enter number:\n");
scanf("%d", &num);
if(num%2 == 0) // 0 is considered to be an even number
printf("\n\n%d is an Even number\n\n",num);
else
printf("\n\n%d is an Odd number\n\n",num);
break;
case 4:
exit (0);
case 5:
break;
default:
printf("\n\nINPUT CORRECT OPTION\n\n\n");
break;
}
}
return 0;
}
