2. The If-else Example Let’s see an example of anif-elsestatement. In the following program, we check whether the employee’s age is greater than 18. On both bases, we print that the employee is a minor or an adult. intage=employee.getAge();if(age>18){System.out.println("Employe...
In Java, if statement is used for testing the conditions. The condition matches the statement it returns true else it returns false. There are four types of If statement they are: 在Java中,if语句用于测试条件。 条件与返回true的语句匹配,否则返回false。 有四种类型的If语句: For example, if we...
Now, if we run the program, the output will be: [1] "You are eligible to vote." Example: Check Negative and Positive Number x <- 12 # check if x is positive or negative number if (x > 0) { print("x is a positive number") } else { print("x is a negative number") } Out...
The if-then and if-then-else Statements Theif-thenStatement Theif-thenstatement is the most basic of all the control flow statements. It tells your program to execute a certain section of codeonly ifa particular test evaluates totrue. For example, theBicycleclass could allow the brakes to de...
Java has the following conditional statements:Use if to specify a block of code to be executed, if a specified condition is true Use else to specify a block of code to be executed, if the same condition is false Use else if to specify a new condition to test, if the first condition ...
Optional 是 Java8 开始提供的新特性，使用这个语法特性，也可以减少代码中 if else 的数量，例如：...
Example: if...else...if Ladderfun main(args: Array<String>) { val number = 0 val result = if (number > 0) "positive number" else if (number < 0) "negative number" else "zero" println("number is $result") } This program checks whether number is positive number, negative number,...
在开发过程中经常会使用if...else...进行判断抛出异常、分支处理等操作。这些if...else...充斥在代码中严重影响了代码代码的美观,这时我们可以利用Java 8的Function接口来消灭if...else...。 if (...){ throw new RuntimeException("出现异常了"); ...
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所以if(x=1)无论x原来为多少if语句都会成立,并且会将x的值改写为1,和if(x==1)有着非常大的区别(那么,if(x=0)呢?),正是x=1这个表达式是有值的,C语言才允许if(x=1)这种写法,一些语言里x=1这个式子是没有值的,只是将x赋值为1,这样写就会报错,如Java。C语言代码里出现if(x=1)一般情况下是你写错...