Solved – ValueError: could not convert string to float

In this article, you will learn how to solve ValueError: could not convert string to float.

Let’s look at code examples that produce the same error.

float('')
# Traceback (most recent call last):
#   File "example.py", line 2, in <module>
# ValueError: could not convert string to float: ''

float('1,200')
# Traceback (most recent call last):
#   File "example.py", line 6, in <module>
# ValueError: could not convert string to float: '1,200'

float('fd')
# Traceback (most recent call last):
#   File "example.py", line 11, in <module>
# ValueError: could not convert string to float: 'fd'

How to Solve ValueError: could not convert string to float

In order to solve it, you can use the try...except block.

a = 123

try:
    float(a)
    print("Input is a valid number")
except:
	print("Input must be a valid number. Non-special characters, commas and spaces are not accepted.")