How do you create a code or program that calculates correctly w/decimals?

Question

An experiment

Answer 1

What language are you using? And could you be more explicit?

Answer 2

but this code returns the length of string if decimal is absent.
however u may use 'if' statement so that it returns value as zero when decimal is absent, to obtain a perfect code.

Answer 3

https://code.sololearn.com/W766MWM8r9Q6/?ref=app

Answer 4

@2+2=4:
Thanks, mate!

Answer 5

I'll remember that