Java if...else Statement
If-Else statements are a component of conditional statements.
There are four types of conditional statements in Java:
- The if statement
- The if-else statement
- The if…elif…else Statement
- The nested-if statement
If Statement
The if statement is used to run a block of code when a specified condition is true.
Syntax:
if (condition){
// block of code to be executed if the condition is true
}Example:
public class Main {
public static void main(String[] args){
if (10 > 5){
System.out.println("10 is greater than 5");
}
}
}Output:
10 is greater than 5
If...else statement
The If...else statement is employed to run a block of code when a given condition is true and an alternative block of code when the condition is not true.
Syntax:
if (condition){
// block of code to be executed if the condition is true
} else {
// block of code to be executed if the condition is false
}Example:
public class Main {
public static void main(String[] args){
int x = 10;
if (x > 5) {
System.out.println("x is greater than 5");
} else {
System.out.println("x is not greater than 5");
}
}
}Output:
x is greater than 5
if…elif…else Statement
Java's if-elif-else statement runs a block of code between multiple options.
Syntax:
if (condition){
// block of code to be executed if condition1 is true
} else if (condition2){
// block of code to be executed if the condition1 is false and condition2 is true
} else {
// block of code to be executed if the condition1 is false and condition2 is false
}Example:
public classMain {
public static void main(String[] args) {
int x = 10;
if (x > 15) {
System.out.println("x is greater than 15");
} else if (x > 10) {
System.out.println("x is greater than 10 but less than or equal to 15");
} else {
System.out.println("x is equal to 10");
}
}
}Output:
x is equal to 10