[FIXED] How to evaluate a string input and check if it is a decimal

Issue

I use python 3 and am trying to figure out how to evaluate a user input string and check for certain characters.

I know that this title is probably going to make it sound like I haven't heard of the .isdecimal() method, but in fact I am trying to allow for a user to input some number as a decimal, including the period, and this is what seems to make the evaluation hard.

For instance,

dec = input()

dec.isdecimal()

Returns False if I have the input 0.5 I could convert the input to a decimal perhaps, but if I don't want to limit the user's input to whole numbers, I'm not sure how else I can approach this evaluation.

Solution

IIUC, you just want to check if your string has a decimal in it. In that case, you could simply do the following.

inp_string = input()

def check_decimal(inp_string):
    return ('.' in inp_string)

check_decimal(inp_string)

Answered By - Sheldore

Answer Checked By - Willingham (PHPFixing Volunteer)