How do you find the factorial of a large number?

For example factorial of 6 is 6*5*4*3*2*1 which is 720….factorial(n)

1. Create an array ‘res[]’ of MAX size where MAX is number of maximum digits in output.
2. Initialize value stored in ‘res[]’ as 1 and initialize ‘res_size’ (size of ‘res[]’) as 1.
3. Do following for all numbers from x = 2 to n.

What is the easiest way to find Factorials?

To find the factorial of a number, multiply the number with the factorial value of the previous number. For example, to know the value of 6! multiply 120 (the factorial of 5) by 6, and get 720. For 7!

How do you calculate big number mod?

How to compute mod of a big number?

1. How to compute mod of a big number?
2. Modulo 10^9+7 (1000000007)
3. Find most significant set bit of a number.
4. Position of rightmost set bit.
5. Position of rightmost different bit.
6. Check whether K-th bit is set or not.
7. Check whether the bit at given position is set or unset.

How do you find the factorial of a number using an algorithm?

Factorial Program In C

1. Algorithm. Algorithm of this program is very easy − START Step 1 → Take integer variable A Step 2 → Assign value to the variable Step 3 → From value A upto 1 multiply each digit and store Step 4 → the final stored value is factorial of A STOP.
2. Pseudocode.
3. Implementation.
4. Output.

How do you find the factorial of a very large number in Java?

To find the factorial of anything above 21, you need to use the BigInteger class from java. math package. As the name suggests, BigInteger class is designed to hold a really large integer value, something which is even bigger than the maximum value of long primitive e.g. 2^63 -1 or 9223372036854775807L.

How do you simplify large factorials?

Compare the factorials in the numerator and denominator. Expand the larger factorial such that it includes the smaller ones in the sequence. Cancel out the common factors between the numerator and denominator. Simplify further by multiplying or dividing the leftover expressions.

Where can I find 11 23 MOD 187?

Therefore, 1123≡88mod187 11 23 ≡ 88 mod 187 .

How to calculate factorial of a large number in Python?

Factorial of a large number 1 Create an array ‘res []’ of MAX size where MAX is number of maximum digits in output. 2 Initialize value stored in ‘res []’ as 1 and initialize ‘res_size’ (size of ‘res []’) as 1. 3 Do following for all numbers from x = 2 to n. More

What is the factorial of a large number?

Factorial of a large number. Factorial of a non-negative integer, is multiplication of all integers smaller than or equal to n. For example factorial of 6 is 6*5*4*3*2*1 which is 720. We have discussed simple program for factorial.

How to calculate factorials in C++?

Note: If you want to precisely calculate the factorial in c++ you may take an array of 1000 chars where each of the char represent a digit. then you will multiply gradually to get the result. n*(n-1)*..2*1

How do you find the factorial of 5?

Multiply Fact with current value of i At last, print the value of Fact. Let the input be 5. The equation that gets created by our algorithm is 5x4x3x2x1. So, The Factorial of 5 is 120 (5x4x3x2x1).