Python 3 7 isdigit string method

sure! the `isdigit()` method in python is a built-in method provided by string objects to check whether all the characters in the string are digits or not. it returns `true` if all characters are digits, otherwise `false`.

here is some important information about the `isdigit()` method:

1. it only returns `true` if all characters in the string are digits (0-9).
2. it does not consider other characters like whitespace, punctuation, or letters.
3. if the string is empty, it will return `false`.

here is an example code snippet demonstrating the use of the `isdigit()` method:

in the code above:
- `string1` consists of only digits, so `isdigit()` returns `true`.
- `string2` contains letters along with digits, so `isdigit()` returns `false`.
- `string3` is empty, so `isdigit()` returns `false`.
- `string4` contains letters along with digits, so `isdigit()` returns `false`.

you can use the `isdigit()` method to validate user input or to check if a string represents a number before performing any operations on it.

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