Convert a String to Float

[glro]

i want to read a number from a text file on my hard drive, containing only this number

i wrote this

hcal = IO.read("C;\\...txt").chomp
hcal.to_f

but when i check

hcal.class

hcal is still a string, not a float...

can you tell me where is my mistake?

[Jim]

hcal = IO.read("file.txt").strip.to_f

[thomthom]

hcal.to_f doesn't modify hcal, it returns a float. So you need to write it like so: hcal = hcal.to_f

[glro]

@thomthom said:

hcal.to_f doesn't modify hcal, it returns a float. So you need to write it like so: hcal = hcal.to_f

thanks to both you...

yes, both codes work nicely; i spent 3 hours to look for a solution, and i get 2 different, in a few minutes, on sketchucation...

learning ruby on the internet is an exciting experience