Numbers are used to represent both integer and floating-point values.

Numbers are most commonly expressed in literal forms like 255 or 3.14159 ↴

let num1 = 5; → number

let num2 = 2.5; → number

let num3 = num1 + num2;

console.log(num3); returns ↴

7.5 → number

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Generate random colors using ↴

for loop → executes a block of code a number of times.

Math.random() static method → returns a floating-point, pseudo-random number that's greater than or equal to 0 and less than 1.

Math.floor() static method → always rounds down and returns the largest integer less than or equal to a given number.

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for loop repeatedly executes a block of code until a specified condition evaluates to false.

The loop runs a block of code a set number of times, defined by an initialization, a condition, and an increment.

for (let x = 0; x < 4; x++) {

console.log(x);

}

Loop variable x is initialized to 0

Condition x < 4 is checked before each iteration.

The loop will continue to run as long as x is less than 4

The loop repeatedly executes a block of code 4 times, from 0 to 3

For each iteration of the loop, the current value of x is printed to the console.

After each iteration, x is incremented by 1 x++

When x reaches 4 the condition evaluates to false, terminating the loop.

0

1

2

3 → printed to console

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Random number generation process of generating a number that is not predictable.

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Math.random() static method returns a floating-point, pseudo-random number between 0 (inclusive) and 1 (exclusive), with approximately uniform distribution over that range, which can be scaled to a desired range.

Math.random() always returns a number lower than 1

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Math.floor() static method always rounds down and returns the largest integer less than or equal to a given number.

Math.floor(5.25); → 5

Math.floor(2.99); → 2

Math.floor(6.55); → 6

Rounds down and returns the largest integer less than or equal to a given number.

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Define a function randomColor to generate a random color in hexadecimal color code.

function randomColor() {}

The function generates a random hexadecimal color code.

Initialize string containing all possible hexadecimal characters.

Initialize the color string with a hash symbol #

let color = "#" color

Loop 6 times to create a six-character color code.

for (let x = 0; x < 6; x++) {}

Within the loop, a random index is generated to select a character from the letters string.

Append a random character from the letters string to the color string.

Return the generated color code.

return color

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Generate random color.

call function

randomColor(); → #ab4351

randomColor(); → #b48a2e

randomColor(); → #769e96

Function returns a random color after each call.