JavaScript

Exercises Set 1

let totalNumberOfVoters = 19;
let numberOfVotesCast = 5;
numberOfVotesCast = 6;

/* 
The variable `totalNumberOfVoters` can be declared using `const`,
as it is NOT updated anywhere in the 3 lines given.
Declare a variable with `let` only if you need to update the
value later, like here for example, `numberOfPeople`.
*/
const totalNumberOfVoters = 19;
let numberOfPeople = 1;
numberOfPeople = 5;

// Area formula of a rectangle is length * breadth.
a = 12
b = 15
console.log(`Area of the rectangle is ${a*b}cm².`)


/*
Declaration of a variable should be done using either let
or const. Variable names should tell us about the data it
holds. We use semicolons after finishing statements in
JavaScript, it makes the code more readable.
*/

const lengthInCm = 12;
const breadthInCm = 15;

console.log(`Area of the rectangle is ${lengthInCm * breadthInCm}cm².`);

// Below we are assigning a student id to a variable
N = 1234;
console.log(N);

/*
We do not commonly start variable names with capital letter
except for specific situations like mathematical notation.
For Example, const Pi = 3.14;
Variable names should tell us about the data it holds.
*/

const studentId = 1234;
console.log(studentId);