Python has several built-in functions that can be directly used in any Python script without importing anything. Here is how you can use some of them:
1. `print()` – This function outputs its parameters to the console:
```
print(“Hello, world!”)
```
1. `len()` – This function returns the length of an object. For sequences (such as strings and lists), it represents the number of elements in the object:
```
print(len(“Hello, world!”)) # 13
print(len([1, 2, 3, 4, 5])) # 5
```
1. `type()` – This function shows what type the object is:
```
print(type(123)) #
print(type(123.45)) #
print(type(“Hello, world!”)) #
```
1. `str()`, `int()`, `bool()`, etc. – These functions convert their arguments into the specified type:
```
print(int(‘123’)) # 123
print(str(123)) # ‘123‘
print(bool(‘True’)) # True
```
1. `sorted()` – This function returns a new sorted list from the items in the given iterable:
```
print(sorted([5, 2, 3, 1, 4])) # [1, 2, 3, 4, 5]
```
1. `range()` – This function generates a sequence of numbers:
```
print(list(range(10))) # [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
```
For more detailed information about built-in functions, you can refer to the Python Documentation: https://docs.python.org/3/library/functions.html.
