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Closuresbeginner

Closures — Add factory

📖 Usage Example
function makeAdder(n) {
  return x => x + n
}
const add5 = makeAdder(5)
add5(3)   // → 8
add5(10)  // → 15

Factory functions use closures to capture a preset value, producing specialized functions without repeating configuration.

Function Factory for Addition

Create a factory function that produces functions with preset behavior.

Challenge: Create a makeAdder(n) function that returns a function. The returned function takes a value and returns the sum of the preset value and the argument.

Example:

const add5 = makeAdder(5)
add5(3)   // 8
add5(10)  // 15
💡 Hints (2)
  • • Return a function that adds the captured value to its argument
  • • The factory captures the preset value in closure