Master Python’s Basic Operators and Comments with Simple Examples

First, the article lists Python’s fundamental arithmetic and comparison operators: + (addition), - (subtraction), * (multiplication), / (division), % (modulo), < (less than), > (greater than), <= (less than or equal), and >= (greater than or equal).

It then asks readers to write the following statements into a program and observe the results:

print("加法--二加九--", 2+9)
print("减法--二减四--", 2-4)
print("乘法--二乘一--", 2*1)
print("除法--五除以三--", 5/3)
print("取余--五除以四取余数--", 5%4)
print("大于号--三大于二--", 3>2)
print("小于号--三小于二--", 3<2)
print("大于等于号--二大于等于二--", 2>=2)
print("小于等于号--五小于等于四--", 5<=4)

Running the program produces the exact output shown below, demonstrating both numeric results and Boolean values:

加法--二加九-- 11
减法--二减四-- -2
乘法--二乘一-- 2
除法--五除以三-- 1.6666666666666667
取余--五除以四取余数-- 1
大于号--三大于二-- True
小于号--三小于二-- False
大于等于号--二大于等于二-- True
小于等于号--五小于等于四-- False

The article explains that comparison operators return Boolean values ( True or False) indicating whether the relationship holds, while arithmetic operators return the computed numeric result.

Next, the tutorial introduces comments. A single‑line comment starts with #, which tells the interpreter to ignore the rest of the line. The example demonstrates this:

#print("我是不被执行的代码")
print("我是被执行的代码")

When executed, only the second line runs, producing:

我是被执行的代码

For multi‑line comments, Python accepts either three single quotes ( ''' ... ''') or three double quotes ( """ ... """) to enclose a block of text that the interpreter ignores. The article encourages readers to experiment with these forms.

Finally, a screenshot of the program’s output is provided for reference: