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Python String | isdigit() method with Examples

Python String isdigit() method with Examples on capitalize(), center(), count(), encode(), find(), format(), index(), join(), lower(), ljust(), isupper(), istitle(), isspace(), isprintable(), isnumeric(), islower() etc.

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Python String isdigit() Method

Python isdigit() method returns True if all the characters in the string are digits. It returns False if no character is digit in the string.

Signature

isdigit()

Parameters

No parameter is required.

Return

It returns either True or False.

Let's see some examples of isdigit() method to understand it's functionalities.

Python String isdigit() Method Example 1

A simple example of digit testing using isdigit() method.

# Python isdigit() method example
# Variable declaration
str = '12345'
# Calling function
str2 = str.isdigit()
# Displaying result
print(str2)

Output:

True

Python String isdigit() Method Example 2

It returns true only if all the characters are digit. See the example below.

# Python isdigit() method example
# Variable declaration
str = "12345"
str3 = "120-2569-854"
# Calling function
str2 = str.isdigit()
str4 = str3.isdigit()
# Displaying result
print(str2)
print(str4)

Output:

True
False

Python String isdigit() Method Example 3

We can use it in programming to check whether a string contains digits or not.

# Python isdigit() method example
# Variable declaration
str = "123!@#$"
if str.isdigit() == True:
    print("String is digit")
else:
    print("String is not digit")

Output:

String is not digit

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