if-else in Java

In Java programming, making decisions is essential. That’s where if-else statements come in! They help your program make choices based on certain conditions.

if-else is a control flow statement that tells your program:

“Do this if a condition is true. Otherwise, do something else.”

Syntax of if-else in Java

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

example :

public class Bignumber {
int a ;
int b ;

Bignumber (int a, int b){
 this.a = a;
 this.b = b;

}
public void findbig (){
    if (a>b){
        System.out.println("a is big ");
    }
    else{
        System.out.println("b is big");
    }
}
public static void main(String[] args) {
    Bignumber big = new Bignumber(100,200 );
    big.findbig();

}

}

output:

b is big

if-else-if is a control flow statement that allows your program to choose between multiple conditions.

It tells your program:

“Check this first. If it’s true, do it.
If not, check the next one.
If nothing is true, do the final else.”

Syntax of if-else-if in Java

if (condition1) {
// Executes if condition1 is true
} else if (condition2) {
// Executes if condition2 is true
} else {
// Executes if none are true
}

EXAMPLE:

public class Bignumber {
int a;
int b;
int c;

Bignumber(int a, int b, int c) {
    this.a = a;
    this.b = b;
    this.c = c;
}

public void findbig() {
    if (a > b && a > c) {
        System.out.println("a is big");
    } else if (b > a && b > c) {
        System.out.println("b is big");
    } else if (c > a && c > b) {
        System.out.println("c is big");
    } 

}

public static void main(String[] args) {
    Bignumber big = new Bignumber(100, 200, 150);
    big.findbig();
}

}

Output:

b is big

referel links :

1 : https://docs.oracle.com/javase/tutorial/java/nutsandbolts/if.html
2 : https://docs.oracle.com/javase/specs/jls/se17/html/jls-14.html#jls-14.9

Comments

[Michael]

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