Logical Operators

Logical Operators return boolean result which makes them suitable for if statements.

Example

Let's look at the following example. Depending on a test score, determine whether the score is low, medium, high or invalid following these rules:

• 0 to 50 - low
• 51 to 75 - medium
• 76 to 100 - high
• less than 0 or more than 100 - invalid

public class Main { public static void main(String[] args) { int score = 80; if (score >= 0 && score <= 50) { System.out.println("low"); } if (score >= 51 && score <= 75) { System.out.println("medium"); } if (score >= 76 && score <= 100) { System.out.println("high"); } if (score < 0 || score > 100) { System.out.println("invalid"); } } }

Output:

high

Explanation:

• To check whether a number is between 2 values && (AND) operator can be used.
• Line 5 checks whether number is greater or equal to 0 and if it's less or equal to 50.
• Line 19 checks whether number is less than 0 or if it's greater than 100.