How to check if a string is a number in Python

In this tutorial, we are going to learn about how to check if a given string is a number in Python.

Consider, we have the following string:

age = "16"

Now, we need to check if the above string contains a number or not.

Using isdigit() method

To check if a string is a number or not, we can use the built-in isdigit() method in Python.

The isdigit() method returns true if a given string is a number; otherwise, it returns false.

Here is an example:

age = "16"
result = age.isdigit()

print(result)

Output:

True

Using isnumeric() method

Similarly, we can also use the isnumeric() method in python, to check if a string is a number.

The isnumeric() method returns true if all characters in a string is numeric (0-9) otherwise it returns false.

Here is an example:

age = "16"
result = age.isnumeric()

print(result)

Output:

True

Note: For negative numbers, the above methods won’t work.