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First digit in product of an array of numbers in C++
In this tutorial, we are going to learn how to find first digit of the product of an array.
Let's see the steps to solve the problem.
Initialize the array.
Find the product of the elements in the array.
Divide the result until it's less than 10.
Print the single-digit
Example
Let's see the code.
#include <bits/stdc++.h>
using namespace std;
int productOfArrayDigits(int arr[], int n) {
int product = 1;
for (int i = 0; i < n; i++) {
product *= arr[i];
}
return product;
}
int firstDigitOfNumber(int n) {
while (n >= 10) {
n /= 10;
}
return n;
}
int main() {
int arr[] = { 1, 2, 3, 4, 5, 6 };
cout << firstDigitOfNumber(productOfArrayDigits(arr, 6)) << endl;
return 0;
}Output
If you run the above code, then you will get the following result.
7
Conclusion
If you have any queries in the tutorial, mention them in the comment section.
Updated on: 29-Dec-2020
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