# formula to find factorial of number

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### What is factorial

Factorial is an operational symbol invented by Kiston Kaman (Christian kramp,1760~1826) in 1808 and is a mathematical term. A positive integer.factorialEnglishfactorial) is the product of all positive integers less than and equal to the number, and

### Sterling Formula-stirling formula (take n factorial approximation)-hdu1018-big number Cattle Network Nowcoder 2018 National

Recently a pile of questions to fill, has been salted fish, fill a pile of water problems are not necessary to write a problem. Forget about this formula.The meaning of the Stirling formula is that when n is large enough, n! is very difficult to

### Factorial-related issues

Definition:A positive integer.factorialEnglishfactorial) is the product of all positive integers less than and equal to the number, and has a 0 factorial of 1.    The factorial writing n! of the natural number N. namely N!=1x2x3x...xn. Factorial can

### LightOJ-1045 Digits offactorial (mathematical formula) logarithmic low formula

LightOJ-1045 Digits of factorial Time Limit: 2000MS Memory Limit: 32768KB 64bit IO Format: %lld &%llu Submit StatusDescriptionFactorial of an integer was defined by the following

### Factorial Analysis poj1150 3406 zoj1222 2358

There are several types of factorial problems: 1. Calculate the number of 0 at the end of the factorial, divide it by 5, and accumulate. 2. How many digits are there in the result of factorial? STIRLING formula: n! ≈ SQRT (2 * pI * n) * (N/E) ^ N,

### Factorial Analysis poj1150 3406 zoj1222 2358

There are several types of factorial problems: 1. Calculate the number of 0 at the end of the factorial, divide it by 5, and accumulate. 2. How many digits are there in the result of factorial? stirling formula: n! ≈ Sqrt (2 * PI * n) * (n/e) ^ n,

### Factorial correlation algorithm and its C + + implementation

The algorithm of factorial is more than two aspects: first, high precision computation and the second is related to number theory. First, the high precision calculation factorial This is actually the least technical content of the problem, but

### Factorial algorithms and their C ++ implementations

The factorial algorithm involves two aspects: high-precision calculation and number theory. I. High-Precision computing factorial This is actually the least technical problem, but it is often used, so you have to write and optimize its

### Find the numberof digits of a numberfactorial

Find the number of digits of a number factorialFlyfish 2015-8-15For example 7! =5040, the factorial result of 7 is 4 digits (10 binary)Ask for a number of digits1 Loop methodint get_digit_loop(int N) { int0; do { digit ++; while100

### 2nd Chapter The charm of numbers-don't be intimidated by factorial

Don't be intimidated by factorial. DescriptionFactorial (factorial) is a very interesting function, but a lot of people are afraid of it, let's look at two factorial-related problems:Question 1. Given an integer n, then the factorial n of n! How

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