CHF -> Operators and Expressions in Java

Ah, operators and expressions in Java – it’s like taking those first steps as a programming infant all over again. Operators and expressions will be your go-to tools for crafting fundamental (and sometimes more advanced) methods in your code. With a firm understanding of these essentials, you’ll be well on your way to mastering the art of Java programming. So, let’s take a look at the key operators every Java developer should know:

Arithmetic Operators

• Addition (+): Adds two values.
• Subtraction (-): Subtracts the right-hand value from the left-hand value.
• Multiplication (*): Multiplies two values.
• Division (/): Divides the left-hand value by the right-hand value.
• Modulus (%): Returns the remainder after dividing the left-hand value by the right-hand value.
• Increment (++) and Decrement (–): Increase or decrease a value by 1, respectively.

Assignment Operators

• Basic assignment (=): Assigns a value to a variable.
• Compound assignment (+=, -=, *=, /=, %=): Performs an arithmetic operation and assigns the result to a variable in a single step.

Comparison Operators

• Equal to (==): Checks if two values are equal.
• Not equal to (!=): Checks if two values are not equal.
• Greater than (>): Checks if the left-hand value is greater than the right-hand value.
• Less than (<): Checks if the left-hand value is less than the right-hand value.
• Greater than or equal to (>=): Checks if the left-hand value is greater than or equal to the right-hand value.
• Less than or equal to (<=): Checks if the left-hand value is less than or equal to the right-hand value.

Logical Operators

• Logical AND (&&): Returns true if both conditions are true, otherwise false.
• Logical OR (||): Returns true if at least one condition is true, otherwise false.
• Logical NOT (!): Returns true if the condition is false, and false if the condition is true.
• The Logical AND (&&) operator only returns true if both conditions are true. In all other cases, it returns false:
  • true && true evaluates to true
  • true && false evaluates to false
  • false && true evaluates to false
  • false && false evaluates to false
• The Logical OR (||) operator returns true if at least one of the conditions is true. It only returns false if both conditions are false:
  • true || true evaluates to true
  • true || false evaluates to true
  • false || true evaluates to true
  • false || false evaluates to false.

Conditional Operator (ternary operator)

• (condition ? expression1 : expression2): Returns expression1 if the condition is true, otherwise returns expression2.

These operators enable you to perform various operations on data and make decisions based on conditions. It’s truly important to understand these operators and know how to use them efficiently in your code. Go ahead and practice using these operators in different situations to gain a deeper understanding of their use and potential challenges.

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That’s it for now, friends! I hope you discovered something valuable today. As we conclude our exploration of Java operators and expressions, remember to integrate these fundamental concepts into your coding routine.

Take it easy, and don’t worry if you can’t memorise everything at once. Focus on learning just a little bit every day, and never give up! It might feel overwhelming at times, but trust in the process, and keep pushing forward. Eventually, all the pieces will click into place, and you’ll find yourself confidently navigating the world of Java with ease. Keep at it, and happy coding!

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Until next time,
eMs
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