In this source code example, we will demonstrate how to use the Python string isdigit() method to determine if all characters in a string are digits.

Use the Python string isdigit() method to check if all characters in a string are digits.

Python string isdigit() method example

The following example uses the isdigit() method to check if the all characters in a string are digits:

quantity = '100'
print(quantity.isdigit())

Output:

True

The following example returns False:

price = '100.5'
print(price.isdigit())

Output:

False

The following example returns False because the string is empty:

empty = ''
print(empty.isdigit())

Output:

False

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