How do we know a string is a number?

Assume that for both short project 07 and programming project 07 you won’t have strings that mix digits (for example 0 and 9) and letters (for example a and x)

How do we know the following strings are names vs. numbers (integers or floats)?

• "Petra"
• "10.5"
• "5"

Check first character of a string

Remember that you can retrieve the first character of a string using [0]

name = "Petra"
name[0].isnumeric()

False

number = "0.10"
number[0].isnumeric()

True

number = "10"
number[0].isnumeric()

True