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Java Logical Operators in Conditions

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Java Logical Operators in Conditions

Logical operators in Java are used to combine multiple conditions (boolean expressions). They help in making decisions during program execution.

✔ List of Logical Operators

Operator Name Description Example
&& Logical AND True only if both conditions are true (a > b && a > c)
Logical OR
! Logical NOT Reverses the boolean value !(a > b)

1️⃣ Logical AND (&&)

Returns true only when both conditions are true.

Example:

public class Main {
public static void main(String[] args) {
int age = 20;

if(age >= 18 && age <= 60) {
System.out.println("Eligible for job");
} else {
System.out.println("Not eligible");
}
}
}

📌 Output:

Eligible for job

2️⃣ Logical OR (||)

Returns true if at least one condition is true.

Example:

public class Main {
public static void main(String[] args) {
int marks = 45;

if(marks >= 35 || marks == 30) {
System.out.println("Pass or Grace Marks Allowed");
} else {
System.out.println("Fail");
}
}
}

📌 Output:

Pass or Grace Marks Allowed

3️⃣ Logical NOT (!)

Reverses the result of the boolean condition.

Example:

public class Main {
public static void main(String[] args) {
boolean isRaining = false;

if(!isRaining) {
System.out.println("You can go outside");
} else {
System.out.println("Stay home");
}
}
}

📌 Output:

You can go outside

✔ Combining Logical Operators

You can combine multiple conditions using &&, ||, and !.

public class Main {
public static void main(String[] args) {
int age = 25;
boolean hasLicense = true;

if(age >= 18 && hasLicense || age > 60) {
System.out.println("Allowed to Drive");
} else {
System.out.println("Not Allowed");
}
}
}

Short-Circuit Behavior

  • && stops checking if first condition is false

  • || stops checking if first condition is true

Example:

int a = 10;

if (a > 5 && a < 15) {
System.out.println("Condition true!");
}

🧠 Summary

Operator Works When Result
&& Both conditions true True
! Opposite of condition True/False reversed

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Sanjit Sinha — Web Developer | PHP • Laravel • CodeIgniter • MySQL • Bootstrap Founder, CodeCapsule — Student projects & practical coding guides. Email: info@codecapsule.in • Website: CodeCapsule.in

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