Why this code return negative result ???????

Question

https://code.sololearn.com/cT7D4y35tiKl/?ref=app

Answer 1

It's range is exceeding Integer range.
For value 20...
So maximum integer value +1 = minimum integer value..
Count goes from min negative value....

Answer 2

beause 20! is equal to
2432902008176640000
which is bigger than the maximum value int data type can hold
https://www.w3schools.com/cs/cs_data_types.asp

Answer 3

It's because the dataype is integer which store only 4byet you need to cast it to long or other data type

Answer 4

But why it works correctly for 25
25 bigger than 20 ??????

Answer 5

That's not the correct answer.
Integers can be stored in only 4bytes.
And max value of Integer is 2147483647.
And 1 to this Integer number you get -2147483648.
So if 20! is equal to
2432902008176640000
which is bigger than the maximum value int data type can hold, it showing only first 4bytes value here.
static int ma(int x)
{
if(x == 1)
{
return 1;
}
return x * ma(x - 1);
}
static long ma(long x)
{
if(x == 1)
{
return 1;
}
return x * ma(x - 1);
}
static void Main(string[] args)
{
Console.WriteLine(ma(20)); //int 20
Console.WriteLine(ma(20L));//long 20
}
Mohammad
Run this code and see difference...

Answer 6

Ok i understand

Answer 7

How do you mentioned me
I cant mentioned
i don't how

Answer 8

While writing, Press @ and select name.
There you can see all follower of this thread, all your followers, whom you following...
Mohammad

Answer 9

Oh my god
Thanks