Java If-Else Control Statement with Program Examples
In this tutorial post we will study and understand the working of the Java If-Else Conditional Statements.
- if statement
- if-else statement
- if-else-if ladder
- nested if statement
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
}Program Example –
public class IfExample {
public static void main(String[] args) {
int num=20;
if(num>0){
System.out.print("Positive");
}
}
}Output
Positive
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
}Program 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. It is used when more than 1 condition is to be checked in relation with the problem.
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
}Program Example –
public class IfElseIfExample {
public static void main(String[] args) {
int num=0;
if(num<0){
System.out.println("Negative");
}
else if(num>0){
System.out.println("Positive");
}
}else{
System.out.println("Neither Negative nor Positive");
}
}
}Output
Neither Negative nor Positive