If you’re building a calculator application using JavaScript, and you want to evaluate operations (+, -, *, /) based on user input, how would you structure a switch statement to handle this?
- Create separate case statements for each operation (+, -, *, /) and perform the corresponding calculation within each case.
- Use regular expressions to match the input against valid operations and handle them accordingly in a single case.
- Convert the user input into a numerical expression and evaluate it within the switch statement.
- Use an if-else statement to check for each operation and perform the corresponding calculation.
To handle different mathematical operations (+, -, *, /) based on user input in a calculator application, it's best to create separate case statements for each operation within a switch statement. This approach is clear and maintainable, allowing you to perform the corresponding calculation for each operation. Using regular expressions within a single case or converting the input into a numerical expression unnecessarily complicates the code. An if-else statement is less idiomatic and less efficient for this purpose.
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