Web-Dev-For-Beginners/translations/pcm/2-js-basics/2-functions-methods/assignment.md

Fun wit Functions

Instructions

For dis assignment, you go practice to create different kain functions to hala the concepts wey you don learn about JavaScript functions, parameters, default values, and return statements.

Create one JavaScript file wey dem dey call functions-practice.js and implement the following functions:

Part 1: Basic Functions

1. Create function wey dem go call sayHello wey no go carry any parameters and e go just log "Hello!" for console.

2. Create function wey dem go call introduceYourself wey go carry one name parameter and e go log message like "Hi, my name na [name]" for console.

Part 2: Functions with Default Parameters

3. Create function wey dem go call greetPerson wey go carry two parameters: name (wey suppose dey) and greeting (optional, default na "Hello"). The function suppose log message like "[greeting], [name]!" for console.

Part 3: Functions wey Dey Return Values

4. Create function wey dem go call addNumbers wey go carry two parameters (num1 and num2) and e go return their sum.

5. Create function wey dem go call createFullName wey go carry firstName and lastName parameters and e go return the full name as one single string.

Part 4: Mix Am All Together

6. Create function wey dem go call calculateTip wey go carry two parameters: billAmount (wey suppose dey) and tipPercentage (optional, default na 15). The function suppose calculate and return the tip amount.

Part 5: Test Your Functions

Add function calls to test each one of your functions and show the results using console.log().

Example test calls:

// Test your function dem here
sayHello();
introduceYourself("Sarah");
greetPerson("Alex");
greetPerson("Maria", "Hi");

const sum = addNumbers(5, 3);
console.log(`The sum is: ${sum}`);

const fullName = createFullName("John", "Doe");
console.log(`Full name: ${fullName}`);

const tip = calculateTip(50);
console.log(`Tip for $50 bill: $${tip}`);

Rubric

Criteria	Exemplary	Adequate	Needs Improvement
Function Creation	All 6 functions dem dey correctly implement with correct syntax and naming conventions	4-5 functions dem dey correctly implement with small syntax issues	3 or less functions implement or big syntax wahala
Parameters & Default Values	Correctly use the parameters wey dem suppose use, optional parameters, and default values as dem talk	Parameters dey okay but e fit get problem with default values	Parameters no correct or missing
Return Values	Functions wey suppose return values, dem dey return am correct, and functions wey no suppose return, dem just dey perform action	Majority return values dey okay but small issues dey	Big problem for return statements
Code Quality	Clean, well-organized code with better variable names and proper indentation	Code work but fit better or better organize	Code hard to read or e poor
Testing	All functions dem test well with correct calls and results show well	Majority functions dem test well	Testing no complete or e wrong

Bonus Challenges (Optional)

If you want take challenge yourself more:

1. Create arrow function version for one of your functions
2. Create one function wey dey carry another function as parameter (like the setTimeout examples wey dey inside lesson)
3. Add input validation to make sure your functions fit handle bad inputs well

---

💡 Tip: Make you remember to open your browser developer console (F12) to fit see the output of your console.log() statements!

---

Disclaimer: Dis document don translate wit AI translation service Co-op Translator. Even though we try make e correct, abeg sabi say automated translations fit get some mistakes or wahala. Di original document for im own language na di correct source. If na serious tins, make person wey sabi do professional human translation do am. We no responsible if mistake or misunderstanding show because of dis translation.