Python Forum

Hello,

I have a unexpected output on a simple multiplication:

0.55*50000

Output:
27500.000000000004

While if I run an equivalent expression

0.55*5*10000

Output:
27500.0

Which is the right output. Is is also the case for other expressions like : 0.55*100 that gives: 55.00000000000001
Anybody knows what this is due to ?

Many thanks,

Inès

floating point is multiplication of two numbers, an integer times an exponent and therefore is a close approximation, not exact

Quote:Which is the right output.

Both are in their situation.

See this thread or this one

You need to learn more about floating point numbers.
Floating point numbers can't represent all decimal fractions.

import webbrowser
webbrowser.open(str(0.1 + 0.2) + '.com')

http://0.30000000000000004.com/


If you need something, which does not have this problem: decimal fractions