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Programming Session key Switch, Case, default,break.
- The switch statement in Java allows executing different code blocks based on an expression's value, replacing lengthy if-else chains for multiple constant comparisons.
- The basic syntax of a switch statement includes the switch expression, cases with values to compare, a default case for unmatched values, and break statements to prevent fall-through.
- Switch statement works with primitive types, wrapper classes, strings (since Java 7), and enum types.
- Cases in a switch statement must be constants or literals matching the switch expression type.
- The break statement terminates a switch block, preventing the execution from falling through to the next case.
- Default case in a switch statement is optional and executes when no other cases match.
- Switch statement is useful for comparing a single variable against multiple constant values, providing clean code and potential performance optimization.
- Enhanced switch expressions in Java 12+ and yield in Java 13+ offer more concise syntax for switch statements.
- Switch vs. if-else chains differ in purpose, readability, performance, expression types, and behavior regarding fall-through.
- Switch is preferable for discrete values, more than 3-4 conditions, readability improvement with case labels, and scenarios where performance optimization matters.
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