If Else in Java Tutorial
Java has the following conditional statements of If else in java
-
if is used to specify a block of code if the condition is true
-
else if is used to specify a block of code if the first condition is false
-
else is used to specify a block of code if the conditions from if and else if are false
The if statement
How is the if else in Java works? if is used to execute a block of code if the condition is true. See this example code below.
Example code
package ifelse;
import java.util.Scanner;
/**
*
* @author KENSOFT
*/
public class IfElse {
public static void main(String[] args) {
System.out.print("Rate from 1 - 10: ");
Scanner scan = new Scanner(System.in);
int n = scan.nextInt();
if(n >= 8 && n <= 10){
System.out.println("Excellent");
}
}
}
That is an example of executing an if statement in Java
Output
Rate from 1 - 10: 10 Excellent
The else if statement
How the else if statement works? else if is used to execute a block of code if the first condition is false. See this example code below.
Example code
package ifelse;
import java.util.Scanner;
/**
*
* @author KENSOFT
*/
public class IfElse {
public static void main(String[] args) {
System.out.print("Rate from 1 - 10: ");
Scanner scan = new Scanner(System.in);
int n = scan.nextInt();
if(n >= 8 && n <= 10){
System.out.println("Excellent");
}else if(n >= 5 && n <= 7){
System.out.println("Very Good");
}
}
}
That is an example of executing an if statement with else if statement in Java
Output
Rate from 1 - 10: 7 Very Good
The else statement
How does the else statement work? else is used to execute a block of code if the condition of if and else if are false. See this example code below.
Example code
package ifelse;
import java.util.Scanner;
/**
*
* @author KENSOFT
*/
public class IfElse {
public static void main(String[] args) {
System.out.print("Rate from 1 - 10: ");
Scanner scan = new Scanner(System.in);
int n = scan.nextInt();
if(n >= 8 && n <= 10){
System.out.println("Excellent");
}else if(n >= 5 && n <= 7){
System.out.println("Very Good");
}else if(n >= 3 && n <= 4){
System.out.println("Good");
}else if(n >= 1 && n <= 2){
System.out.println("Bad");
}else{
System.out.println("Rating is out of scope");
}
}
}
Output
Rate from 1 - 10: 11 Rating is out of scope
That’s how you do If else in Java.
