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 statementif-else statementif-else-if laddernested if statementJava 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
