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Functions: JavaScript: Uncharted

Courses JavaScriptFunctions

Functions

Name reusable behavior, personalize it with parameters, return useful values, and compose small functions into larger programs.

JavaScript
Unit 6 of 20
20 lessons
181 min
420 XP

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Lessons

20 total

1Recipes You Can ReuseRecognize repeated work that benefits from one named, reusable routine.InteractiveConcept6 min20 XPOpen
2Define and CallDeclare a named function and call it twice.CodeConcept8 min20 XPOpen
3Parameters PersonalizeUse a function parameter to greet two different people.CodeConcept8 min20 XPOpen
4Teach the Courier: go(n)Define a helper that repeats forward movement for a requested number of steps.Code worldConcept10 min20 XPOpen
5return Hands BackReturn a computed value instead of only printing it inside a function.CodeConcept8 min20 XPOpen
6Use What ReturnsFeed a returned function value into another expression.CodeConcept8 min20 XPOpen
7Two Inputs, One AnswerCompute a delivery fee from two independent function inputs.CodeConcept9 min20 XPOpen
8Turn-Around HelperDefine and reuse a turnAround helper in a there-and-back courier route.Code worldConcept10 min20 XPOpen
9Trace the CallPredict the value produced by a function call.InteractiveConcept7 min20 XPOpen
10Defaults When MissingProvide a default parameter value that callers may override.CodeConcept8 min20 XPOpen
11Guard ClausesReturn early when a function receives an unusable input.CodeConcept9 min20 XPOpen
12Stack of CallsArrange call frames as nested functions begin and return.InteractiveConcept8 min20 XPOpen
13Arrows: the Short FormWrite a one-expression arrow function with an implicit return.CodeConcept8 min20 XPOpen
14L-Route BuilderUse a two-parameter route helper for three differently sized legs.Code worldConcept11 min20 XPOpen
15Converter TrioImplement three small conversion functions from precise rules.CodePractice11 min20 XPOpen
16Functions Calling FunctionsCompose price, subtotal, and total so each function builds on the one below it.CodeConcept10 min20 XPOpen
17Call to Result MatchEvaluate several function calls and match each call to its result.InteractiveConcept7 min20 XPOpen
18Receipt Line, the FunctionReturn and print a consistently formatted receipt line from three inputs.CodePractice11 min20 XPOpen
19Patrol from PartsCompose a long patrol from two existing movement helpers.Code worldPractice12 min20 XPOpen
20Functions Mastery CheckImplement and compose two functions from a delivery-pricing specification.CodeMastery check12 min40 XPOpen