Java If-else Statement

The Java if statement is used to test the condition. It checks boolean condition: true or false. There are various types of if statement in java.

if statement
if-else statement
nested if statement
if-else-if ladder

Java IF Statement

The Java if statement tests the condition. It executes the if block if condition is true.

Syntax:

if(condition){
//code to be executed
}

Example:

public class IfExample {
public static void main(String[] args) {
	int age=20;
	if(age>18){
		System.out.print("Age is greater than 18");
	}
}
}

Output:

Age is greater than 18

Java IF-else Statement

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

Syntax:

if(condition){
//code if condition is true
}else{
//code if condition is false
}

Example:

public class IfElseExample {
public static void main(String[] args) {
	int number=13;
	if(number%2==0){
		System.out.println("even number");
	}else{
		System.out.println("odd number");
	}
}
}

Output:

odd number

Java IF-else-if ladder Statement

The if-else-if ladder statement executes one condition from multiple statements.

Syntax:

if(condition1){
//code to be executed if condition1 is true
}else if(condition2){
//code to be executed if condition2 is true
}
else if(condition3){
//code to be executed if condition3 is true
}
...
else{
//code to be executed if all the conditions are false
}

Example:

public class IfElseIfExample {
public static void main(String[] args) {
	int marks=65;
	
	if(marks<50){
		System.out.println("fail");
	}
	else if(marks>=50 && marks<60){
		System.out.println("D grade");
	}
	else if(marks>=60 && marks<70){
		System.out.println("C grade");
	}
	else if(marks>=70 && marks<80){
		System.out.println("B grade");
	}
	else if(marks>=80 && marks<90){
		System.out.println("A grade");
	}else if(marks>=90 && marks<100){
		System.out.println("A+ grade");
	}else{
		System.out.println("Invalid!");
	}
}
}

Output:

C grade

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