we have a technique calledMnemonic(记忆的).The idea is when you choose a variable name,you should choose a variable name to be sensible and Python doesnt care whether you choose mnemonic variable names or not. Assignment Statements: An assignment statement consists of an expression on the right...
Variable：在程序中存储数据的标识符。Assignment：将值分配给变量的操作。Function：一段可重用的代码块，...
条件语句（Conditional Statement）if Statementif语句Comparison Operators比较运算符else Statementelse语句Logi...
1.5.3 Defining Functions II: Local Assignment The effect of anassignment statementis to bind a name to a value in the first frame of the current environment. As a consequence, assignment statements within a function body cannot affect the global frame. 1.5.4 Conditional Statements Conditional sta...
所谓条件语句(Conditional Statement),顾名思义,就是依据某个条件来执行指定的代码。 首先看只有一个条件分支的语句结构,如图6-2-1所示: if:发起条件语句的关键词,注意只能是小写字母。 bool(expression)如果表达式的布尔值是True,就执行此条件分支下面的语句块;否则不执行。
A common use of the conditional expression is to select variable assignment. For example, suppose you want to find the larger of two numbers. Of course, there is a built-in function, max(), that does just this (and more) that you could use. But suppose you want to write your own co...
Else if statement So far, we have presented a Boolean option for conditional statements, with eachifstatement evaluating to either true or false. In many cases, we will want a program that evaluates more than two possible outcomes. For this, we will use anelse ifstatement, which is written...
A simple statement is a construct that occupies a single logical line, like an assignment statement. A compound statement is a construct that occupies multiple logical lines, such as a for loop or a conditional statement. An expression is a simple statement that produces and returns a value. ...
StatementAssignmentVariableName 5 5 0 StatementConditional 1 0 1 StatementExpressionOnly 3 0 3 StatementReleaseVariableParameter 2 2 0 StatementReraiseException 1 0 1 StatementReturnNone 1 0 1 StatementReturnReturnedValue 1 1 0 StatementTry 1 0 1 ...
One line if else statement: a =2 b =330 print("A")ifa > belseprint("B") Try it Yourself » This technique is known asTernary Operators, orConditional Expressions. You can also have multiple else statements on the same line: