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# isdigit(), isdecimal(), isalpha()

## .isdigit()

* Checks if all characters in string is digit

```python
'76'.isdigit()  # Evaluates to True
'1.2'.isdigit() # Evalutates to False
```

## .isdecimal()

Is decimal works the same way as `.isdigit()`

```python
'76'.isdigit()  # Evaluates to True
'1.2'.isdigit() # Evalutates to False
```

## .isalpha()

* Checks if all characters in the text are letters

```python
'abc'.isalpha() # Evaluates to True
'76'.isalpha()  # Evaluates to False
```