Truncate a float in Erlang

Question

I am using a function to create a list from a float.

 float_to_list(0.02).

It returns:

\"2.00000000000000000000e-002\"
         


        

Answer 1

Are you looking for something like this:

6> F = 5/2.
2.50000
7> io_lib:format("~.1f",[F]).
["2.5"]
8> io_lib:format("~.2f",[F]).
["2.50"]
9> io_lib:format("~.3f",[F]).
["2.500"]

if yes, have a look at the module io_lib.