The first function is to produce a factorial using a for-loop. I included a 'stopifnot' prior to running the loop to prevent an infinite loop from occuring in the case of entry of a negative number.

#Python Program for #factorial of a 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.

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Day4: Crafting a LinkedIn post "Excited to share my code for calculating the factorial of a number! In programming, the factorial of a non-negative integer is the product of all positive integers less ...