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Using If Else Statements to Handle Choices for Beginners in Java

  • Java uses if, else if, and else statements to make choices based on conditions.
  • An if statement in Java checks a boolean expression inside parentheses to control code execution.
  • Java bytecode instructions like if_icmpgt, if_icmpeq, if_icmple handle comparisons for numbers.
  • The else if statement allows chaining multiple conditions to test different values sequentially.
  • The else block serves as a catch-all for cases that didn't match any preceding conditions.
  • Braces around a block are optional for a single line but are recommended to avoid errors.
  • Java requires conditions in if statements to result in boolean values.
  • Combining checks in Java is done using && (and) or || (or) operators.
  • The program chooses the path based on the first condition that evaluates to true.
  • Examples like grading scales and pricing rules demonstrate the practical application of if, else if, and else in Java.

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