The if keyword in Java is a conditional statement that allows you to execute a block of code only if a specified condition evaluates to true. It is one of the fundamental control flow statements in Java, enabling decision-making in your programs.Usage...
When we need to execute a set of statements based on a condition then we need to usecontrol flow statements. For example, if a number is greater than zero then we want to print “Positive Number” but if it is less than zero then we want to print “Negative Number”. In this case ...
如果else语句的条件表达式为true,则执行else代码块;否则,跳过else代码块,继续执行if语句之后的代码。 下面是一个简单的Java示例,演示了if条件语句的执行流程: publicclassIfExample{publicstaticvoidmain(String[] args){inta =10;intb =20;if(a > b) { System.out.println("a大于b"); }else{ System.out.pr...
import java.util.List; import java.util.function.Predicate; import java.util.stream.Collectors; public class Validator<T> { private final List<ValidationRule<T>> rules = new ArrayList<>(); public Validator<T> rule(Predicate<T> condition, String message) { rules.add(new ValidationRule<>(condi...
The last most else is executed only when no condition in the whole ladder returns true. Here is a program which demonstrates if-else ladder. It determines if a given alphabet is vowel or consonant. //Demonstrates if-else ladder public class ControlFlowDemo { public static void main(String[]...
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 ...
The condition can be any Java expression, as long as the result of the expression is a boolean result (either true or false). In the example above, the condition was whether the isValid variable was true or false. If the block of code to be executed is just a single statement, ...
Multiple else-if Conditions:Theelse ifcondition can be used multiple times before the finalelsestatement. Execution Order:Java executes theif-elseconditions from top to bottom, and once a condition is met, the remaining conditions are ignored. ...
Java example code to check if a number is even, odd or prime package com.as400samplecode; public class CheckMyNumber { public static void main(String[] args) { boolean even = false; boolean prime = true; int myNumber = Integer.parseInt(args[0].trim());...
0 - This is a modal window. No compatible source was found for this media. ageage}elseif(age<21){printf("You need to be over 21\n");}else{printf("You are over 18 and older than 21 so you can continue \n");}} Output