The **`isdecimal()` function** in Python tells whether a string contains all numeric characters. 

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## Syntax
The syntax of the `isdecimal()` method is as follows:
 

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## Parameters
The `isdecimal()` method does not take any parameters. 
## Return value
`isdecimal()` returns a boolean value. If the string contains all decimal characters, the function returns `True`. Otherwise, it returns `False`.

## Code

In the code below, the `isdecimal()` function returns `False` when the string contains either all alphabet or alphanumeric characters. However, in the case of a complete numeric string, the method returns `True`.

# contains all numbers
num = "12345"
print(num.isdecimal())

# contains all alphabets
alpha = "abcdef"
print(alpha.isdecimal())

# contains both alphabets and numbers
alphanum = "abc34de78"
print(alphanum.isdecimal())

What is isdecimal() in Python?

Syntax

Parameters

Return value

Code