How to realize the factorial of digits by java

This article mainly shows you how java realizes the factorial of your numbers. The content is easy to understand and clear. I hope it can help you solve your doubts. Let me take you to study and learn this article "how to realize the factorial of your numbers by java".

145 is an interesting number because 1! + 4! + 5! = 1 + 24 + 120 = 145.

Find out the sum of the factorials of all the numbers equal to their own numbers, and find their sum.

Note: because 1! = 1 and 2! = 2 are not in the form of sum, they are outside the scope of discussion.

System.out.println (digitCancellingFractions ())

Analysis:

By removing the numbers on the left or right and dividing them about, see if they are equal. Then multiply all the numerators that meet the conditions, multiply the denominator separately, and then divide them into approximate fractions. Gcd means to find the greatest common divisor.

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