The user has to enter a number, then divide the given number into individual digits, and finally, find the product of those individual digits using for loop.
The logic to find the product of given digits is as follows −
for(product = 1; num > 0; num = num / 10){
rem = num % 10;
product = product * rem;
}Example1
Following is the C program to find the product of digits of a given number by using for loop −
#include <stdio.h>
int main(){
int num, rem, product;
printf("enter the number : ");
scanf("%d", & num);
for(product = 1; num > 0; num = num / 10){
rem = num % 10;
product = product * rem;
}
printf(" result = %d", product);
return 0;
}Output
When the above program is executed, it produces the following result −
enter the number: 269 result = 108 enter the number: 12345 result = 120
Example2
Consider another example to find the product of digits of given number by using while loop.
#include <stdio.h>
int main(){
int num, rem, product=1;
printf("enter the number : ");
scanf("%d", & num);
while(num != 0){
rem = num % 10;
product = product * rem;
num = num /10;
}
printf(" result = %d", product);
return 0;
}Output
When the above program is executed, it produces the following result −
enter the number: 257 result = 70 enter the number: 89 result = 72