Function (Programming) CS Thinking Example 4
Follow the full solution, then compare it with the other examples linked below.
Example 4
mediumGiven `FUNCTION toSeconds(minutes): RETURN minutes * 60`, what does `toSeconds(3)` return, and why is using a function better than rewriting `minutes * 60` everywhere?
Solution
- 1 Step 1: Substitute the input value: toSeconds(3) = 3 * 60 = 180.
- 2 Step 2: Using a function is better because the logic is written once and can be reused, updated, and tested in one place.
Answer
180. A function improves reuse, readability, and maintainability because the conversion rule lives in one named block.
Functions package a task behind a clear name. That reduces repetition and makes programs easier to understand, change, and debug.
About Function (Programming)
A named, reusable block of code that performs a specific task, taking input (parameters) and optionally returning output (a return value). Functions allow you to write a piece of logic once and use it many times throughout a program.
Learn more about Function (Programming) →More Function (Programming) Examples
Example 1 medium
Define a function `double(n)` that returns n × 2. Then trace `double(double(3))`.
Example 2 mediumWhy is it better to write a function `calculateTax(amount, rate)` than to repeat the tax calculation
Example 3 mediumWrite a function `isEven(n)` that returns TRUE if n is even, FALSE otherwise. Trace it for n = 7.