How is the f used in the print command in Python?

In Python, using f-strings (also known as formatted strings) allows you to embed expressions, variables, or literals into a string. With f-strings, you can easily construct strings that contain dynamic values.

Here is a simple example:

name = "Alice"
age = 25

print(f"我的名字是{name}，今年{age}岁。")

The output result is:

我的名字是Alice，今年25岁。

In the above example, we used f-strings to embed the values of the name and age variables into the string. By adding the letter f before the string, we can use curly braces {} to enclose variables or expressions, which will be replaced with their corresponding values.

You can also use simple expressions in curly braces, such as arithmetic operations, function calls, etc. Below is an example of performing simple calculations using the f-string.

num1 = 10
num2 = 5

print(f"两个数的和为{num1 + num2}，差为{num1 - num2}。")

The output is:

两个数的和为15，差为5。

It’s important to note that f-strings are only available in Python 3.6 and above. If you are using an older version of Python, you can consider using other string formatting methods, such as str.format() or the % operator.