Java if-else Statement Example

Java Control Statements

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• Java if Statement
• Java Nested if Statement
• Java if-else-if Statement
• Java Switch Case
• Java Switch with String
• Java Nested Switch
• Java Simple for Loop
• Java for each Loop
• Java Nested for Loops
• Java while loop
• Java continue Statement with for Loop
• Java continue in do-while Loop
• Java break to Exit a for Loop
• Java break with Nested Loops

Java if-else Statement Example demonstrates how to use if-else statement with an example in Java.

Java if-else Statement

The Java if-else statement also tests the condition. It executes the if block if a condition is true otherwise else block, is executed.

Syntax

if(condition){  
     statement 1; //code if condition is true  
}else{  
     statement 2; //code if condition is false  
}  

Here, each statement may be a single statement or a compound statement enclosed in curly braces (that is, a block). The condition is an expression that returns a boolean value.

The if works like this: If the condition is true, then statement1 is executed. Otherwise, statement2 (if it exists) is executed.

Java if-else Statement Example

The following program, IfElseDemo, assigns a grade based on the value of a test score: an A for a score of 90% or above, a B for a score of 80% or above, and so on.

package net.javaguides.corejava.controlstatements.ifelse;

public class IfElseDemo {
    public static void main(String[] args) {

        int testscore = 76;
        char grade;

        if (testscore >= 90) {
            grade = 'A';
        } else if (testscore >= 80) {
            grade = 'B';
        } else if (testscore >= 70) {
            grade = 'C';
        } else if (testscore >= 60) {
            grade = 'D';
        } else {
            grade = 'F';
        }
        System.out.println("Grade = " + grade);
    }
}

Output:

Grade = C

Note that the value of the test score can satisfy more than one expression in the compound statement: 76 >= 70 and 76 >= 60. However, once a condition is satisfied, the appropriate statements are executed (grade = 'C';) and the remaining conditions are not evaluated.

Reference

https://www.javaguides.net/2018/10/java-if-ifelse-nestedif-ifelseif-statement-with-examples.html