In the following example, the “OR” operator is used along with the “if-statement” to compare two conditions. Multiple conditions are applied to the given data with the help of the “OR” operator. It will r
由于python 并不支持 switch 语句,所以多个条件判断,只能用 elif 来实现,如果判断需要多个条件需同时判断时,可以使用 or (或),表示两个条件有一个成立时判断条件成功;使用 and (与)时,表示只有两个条件同时成立的情况下,判断条件才成功。 实例 #!/usr/bin/python# -*- coding: UTF-8 -*-# 例3:if语句多...
x = 1 total = 0 # start of the if statement if x != 0: total += x print(total) # end of the if statement print("This is always executed.") Run Code Here, the body of if has two statements. We know this because two statements (immediately after if) start with indentation....
An else statement follows an if statement, and contains code that is called when the if statement evaluates to False. As with if statements, the code inside the block should be indented. You can chain if and else statements to determine which option in a series of possibilities is true. Fo...
2、表达式(expressions)和语句(statements)不同。赋值语句(assignment statement)不会产生任何值。但是,赋值表达式(嗄ssignment expression)在分配变量的同时还能求值。 3、当需要管理特定上下文时,我们可以使用with语句。最常见的情况是对一个文件进行操作。退出上下文时,上下文管理器会自动为我们关闭文件。
ifname ='迹忆客':print('success') SyntaxError: invalid syntax. Maybe you meant == or -= instead of = 错误是因为我们使用了一个等号而不是两个等号。 如果比较值,请确保使用双等号。 name ='迹忆客'# ✅ 比较时使用双等号ifname =='迹忆客':# 👇️ this runsprint('success')...
可以在 if 语句块的代码中嵌套 if 语句,在其中指定另一个if语句。这是另一个假设中的一个假设, 或者我们所说的嵌套if语句. 英文: You can have nested if statements, where you specify another if statement, within your if statement block of codes. It's an if inside another if. Or what we call...
Comparing Python If Statement to Other Languages InC and Java programming, curly braces are used to identify the “if” statement Block, and any statement or condition outside the braces does not belong to the “if” Block. The statement or operation inside the “if” block is ended with a...
If statements are control flow statements which helps us to run a particular code only when a certain condition is satisfied. For example, you want to print a message on the screen only when a condition is true then you can use if statement to accomplish
If…Elif…Else Statement in Python Nested if Statement in Python Shorthand If and If…Else in Python Logical Operators with If…Else Statements in Python Using If…Else Statements Inside Functions in Python Working with If…Else Statements in Loops Using If…Else in a For Loop Using If…Else...