The code does not see else condition

In the code last if statement does not works. In order to title the plot.

Answer 1

[Scott MacKenzie]

You've got an error in how you setup the if-expressions. For example, you need to change the first if-expression from

320 < wavelength < 325

to

320 < wavelength && wavelength < 325

Change the others in a similar manner, and try again.

To explain, note that

320 < wavelength < 325

is syntactically correct, but is the same as

(320 < wavelength) < 325

and reduces to either

0 < 325

or

1 < 325

I doubt this is what you intended.

[Onur Hakverdi]

320 < wavelength && wavelength < 325 I tried this but It gives error.