In this tutorial, we will explain how to use Python string isdecimal() method with basic syntax by example for better understanding.

The String isdecimal() method returns True if all the characters of the string are decimal; otherwise, it returns False.

Syntax:

<string_value/string_variable>.isdecimal()

Input Parameters:

• string_value / String variable : The string that we want to check whether it’s decimal or not.

Python Check String is decimal

We can check the string value it’s decimal or not by simply using the isdecimal() method. It means the string value is decimal. one example of a decimal value is “2021” and a non-decimal value is “20 21”.

Example (1)

#Print the result of isdecimal() method
num='2021'
print ('String variable is a decimal:', num.isdecimal())

Output of example (1)

String variable is a decimal: True

In the above example, string variable ‘num’ includes numbers so when we checked the number data type of it by  num.isdecimal() in print statement then it shows the result as True.

Example (2)

#Print the result of isdecimal() method
print('String variable is decimal:','20 21'.isdecimal())

Output of example (2)

String variable is a decimal: False

In the above example, string variable ‘num’ is decimal so when we checked the number data type of it by num.isdecimal() in print statement then it shows the result as False.

In this tutorial, you have learned the string isdecimal() method in Python. What is it? And how to check whether the string value it is a decimal or not.
If you have an inquiry or doubt, don’t hesitate to leave them in a comment. We are waiting for your valuable feedback.

Hopefully, it was clear and concise.

Similar Python String Checking Methods:

• isalnum() : It returns True if all the characters of the string are alphadecimal; otherwise, it returns False.
• isdigit() : It returns True if all the characters of the string are digit; otherwise, it returns False.
• isnumeric() : It returns True if all the characters of the string are numeric; otherwise, it returns False.
• isalpha() : It returns True if all the string characters are the alphabet; otherwise, it returns False.
• islower() : It returns True if all the string characters are in lowercase; otherwise, it returns False.
• isupper() : It returns False if all the string characters are in an uppercase; otherwise, it returns False.
• isspace() : It returns True if all the characters of a string are whitespace; otherwise, it returns False.
• istitle() : It returns True if all the string words are properly “title cased”; otherwise, it returns False.
• startswith() : It returns True if the string starts with a given substring between the given start and end index; otherwise, it returns False.
• endswith() : It returns True if the string ends with a given substring between start and end index; otherwise, it returns False.

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