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This article explains in detailPythonVariablesBasicData types if、whileStatement
Variable name: can only be composed of numbers, letters, and underscores and cannot start with a number; variable names cannot be python internal keywords
Basic data types: numbers, String, Boolean value (True/False)
[if conditional statement]
if condition:
Else ## counter Conditions 1: code block Elif condition 2: Code block elif condition three: Code block else: Code block
[Simple
User Login
Program]name = input("Username:") pwd = input("Password:") if name == "zjw" and pwd == "123" print('yes') else: print('no')[while loopStatement] Code block 【Example】【Output all positive
integers within 10
】import time n = 1 flag = True while flag: print(n) if n ==10: flag == False n=n+1 time.sleep(1) print("end")【break] Used to jump out of the current loop, and the code below break will no longer be executed
n = 1 while True: print(n) if n ==10: break n=n+1[continue] Used to jump out of this loop and continue the next loop
while True: print("123") continue print("456")
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