Factorial of number n is defined as follow:
n! = 1 * 2 * 3 * 4 * ....* n
Algorithm to find factorial of a given number N:
Step 1: Start
Step 2: Declare variables: N, fact, i.
Step 3: Initialize variables
fact = 1
i = 1
Step 4: Read value of N from user.
Step 5: Repeat following steps until i = N
fact = fact * i
i = i + 1
Step 6: Print fact variable.
Step 7: Stop
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