Functions

Question 1

What is a function ?

Answer 1

A function is a piece of code which we can use over and over in our entire code.

Question 2

Example of Function ?

Answer 2

function logger() {
    console.log('My Name is Ram')
}

logger()
logger()
logger()

Output 
My Name is Ram
My Name is Ram
My Name is Ram
My Name is Ram

Question 3

Can Function Send and Receive Data ?

Answer 3

Yes, Function can Send and Receive Data

Question 4

Example of Function ( Data Send and Received )

Answer 4

function fruitProcessor(apples, oranges, bananas) {
    const juice = `juice with ${apples} apples and ${oranges} oranges and ${bananas} bananas.`
    return juice;
}
const appleJuice = fruitProcessor(3, 2, 4)
console.log(appleJuice)

const bananaJuice = fruitProcessor(2, 1, 5)
console.log(bananaJuice);

Question 5

Coding Challenge  ( Function )
LECTURE: Functions
1. Write a function called 'describeCountry' which takes three parameters:
'country', 'population' and 'capitalCity'. Based on this input, the function returns a string with this format: 

‘Finland has 6 million people and its capital city is Helsinki’

2. Call this function 3 times, with input data for 3 different countries. Store the returned values in 3 different variables, and log them to the console

Answer 5

function describeCountry(country, population, capitalCity) {
return ${country} has ${population} million people and its capital city is ${capitalCity};
}
const descPortugal = describeCountry(‘Portugal’, 10,
‘Lisbon’);
const descGermany = describeCountry(‘Germany’, 83,
‘Berlin’);
const descFinland = describeCountry(‘Finland’, 6,
‘Helsinki’);
console.log(descPortugal, descGermany, descFinland);

Question 6

Coding Challenge ( Function )
The Puppy Age Calculator

You know how old your dog is in human years, but what about dog years? Calculate it!

Write a function named calculateDogAge that: takes 1 argument: your puppy’s age.
calculates your dog’s age based on the conversion rate of 1 human year to 7 dog years.
outputs the result to the screen like so: “Your doggie is NN years old in dog years!”
Call the function three times with different sets of values.
Bonus: Add an additional argument to the function that takes the conversion rate of human to dog years.

Answer 6

function calculateDogAge(age) {
    var dogYears = 7*age;
    console.log("Your doggie is " + dogYears + " years old in dog years!");
}

calculateDogAge(1);
calculateDogAge(0.5);
calculateDogAge(12);

Question 7

Coding Challenge ( Function )
The Lifetime Supply Calculator

Ever wonder how much a “lifetime supply” of your favorite snack is? Wonder no more!

Write a function named calculateSupply that:
takes 2 arguments: age, amount per day.
calculates the amount consumed for rest of the life (based on a constant max age).
outputs the result to the screen like so: “You will need NN to last you until the ripe old age of X”
Call that function three times, passing in different values each time.
Bonus: Accept floating point values for amount per day, and round the result to a round number.

Answer 7

function calculateSupply(age, numPerDay) {
  var maxAge = 100;
  var totalNeeded = (numPerDay * 365) * (maxAge - age);
  var message = 'You will need ' + totalNeeded + ' cups of tea to last you until the ripe old age of ' + maxAge;
  console.log(message);
}

calculateSupply(28, 36);
calculateSupply(28, 2.5);
calculateSupply(28, 400);