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.
One line Solution (Using Ternary operator):
The above solutions cause overflow for small numbers. Please refer factorial of large number for a solution that works for large numbers.
Please refer complete article on Program for factorial of a number for more details!
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