Why does the factoriel function in yhis code doesnt work properly for big numbers?

Question

Hey guys could u please have a look at this code and tell me what is going wrong? https://code.sololearn.com/cmERjMyJz5eR/?ref=app

Answer 1

Because the data type integer is limited to a shorter range of numbers. long long int works here:

https://code.sololearn.com/cBLZuKvEs67t/?ref=app

Here is a table with some more information on max values of in, long int etc. :

https://www.zentut.com/c-tutorial/c-integer/

Answer 2

#include<limits.h>

Integers(int) are bounded by INT_MIN and INT_MAX, use INT_MAX to see max value int can store you will see fact(16) will be below it, but fact(17) onwards it will be bigger than INT_MAX value.

Answer 3

when the number reach the upper limit (INT_MAX) it'll loop back and start again from the lowest possible value (INT_MIN)

Answer 4

That is a so-called integer overflow:

https://en.m.wikipedia.org/wiki/Integer_overflow

Answer 5

Tnx for ur answeres but the thing is why does it show a negetive number when we use int

Answer 6

Oooh it makes sense now😂
Thank u all