Factorial of a positive number is a number which is obtained by multiplying all sequence of number starting with 1 till the number itself. Thus factorial calculation is a repititive process and recursion is often used for this.

unsigned int factorial(unsigned int n ) { if ( n <= 1 ) { return 1; } else { return n * factorial(n - 1);/*Call itself*/ } }

factorial can also be done using normal loop based logics. Below is non-recursive code sniffet.

unsigned int factorial(unsigned int n ) { int result = 1; for (i = n; i > 1; i--) { result = result * i; } return result; }

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