How to use built-in functions in Python

How to use built-in functions in Python

Python is a simple and easy-to-learn programming language with a rich library of built-in functions that can help us work more efficiently Write code. This article will introduce some common Python built-in functions and provide specific code examples to help readers better understand and use these functions.

1. print()

print()function is used to output content to the console. We can pass text, variables, expressions, etc. as parameters to this function to implement the output function.

Sample code:

print("Hello, World!") name = "Alice" print("My name is", name) x = 10 y = 20 print("The sum of", x, "and", y, "is", x+y)

2. len()

len()function is used to obtain The length of objects such as strings, lists, and tuples. It returns the number of elements in the object.

Sample code:

string = "Hello, World!" print("The length of the string is", len(string)) my_list = [1, 2, 3, 4, 5] print("The length of the list is", len(my_list)) my_tuple = (1, 2, 3) print("The length of the tuple is", len(my_tuple))

3. input()

input()function is used to read from The console gets user input. It accepts an optional prompt as a parameter and returns the input as a string.

Sample code:

name = input("Please enter your name: ") print("Hello,", name) age = input("Please enter your age: ") print("You are", age, "years old.")

4. type()

type()function is used to obtain The type of object. It returns a string representing the object type.

Sample code:

x = 10 print("The type of x is", type(x)) y = "Hello, World!" print("The type of y is", type(y)) z = [1, 2, 3] print("The type of z is", type(z))

5. range()

range()function is used to generate A sequence of integers, often used in loops to control the number of loops.

Sample code:

for i in range(1, 6): print(i) my_list = list(range(1, 6)) print(my_list)

6. str()

str()function is used to Convert other types of objects to strings.

Sample code:

x = 10 print("The type of x is", type(x)) x_str = str(x) print("The type of x_str is", type(x_str)) y = 3.14 print("The type of y is", type(y)) y_str = str(y) print("The type of y_str is", type(y_str))

7. int()

int()function is used to Convert a string or floating point number to an integer.

Sample code:

x = "10" print("The type of x is", type(x)) x_int = int(x) print("The type of x_int is", type(x_int)) y = 3.14 print("The type of y is", type(y)) y_int = int(y) print("The type of y_int is", type(y_int))

These are just a small part of Python’s built-in functions, there are many other useful functions waiting for you to explore and use. Mastering the use of these built-in functions can greatly improve our programming efficiency. Hope this article can be helpful to readers.

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