Today is the 4th day of my #100DaysOfCode journey with JavaScript.
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This Article is a part of the JavaScript Fundamentals series.
Today, I learned about Math.random, Math.floor Functions and to call a function within our function.
Math.random
In JavaScript, there are many math utilities on the Math object. To get a random number we can call the Math.random function.
const myRandomNumber = Math.random();
The above line will return some number between 0 and 1 (not including 1). Math.random can also be used to generate random numbers between the range.
Example: Inside getRandom, get a random number from the Math.random() function. Then, return that number!👇🏼
function getRandom() {
return Math.random();
}
A random number between 0 and 100 could be created by simply multiplying the output:
// randomNumber will be between 0 and 100
const randomNumber = Math.random() * 100;
We could multiply and then add to get a random number between 15 and 100:
// randomNumber will be between 15 and 100
const randomNumber = (Math.random() * 85) + 15;
Math.floor
Math.floor takes arguments.
const two = Math.floor(2.2598223);
Math.floor function will take 2.2598223 and return 2. A number will be rounded to the nearest integer using this function. For instance, if the input was 2.9999, the method would round it to 2.
Example: Take the argument x and use Math.floor to turn it into an integer without the values after the decimal place. Once you have this floored value, return it!
function getFloor(x) {
return Math.floor(x);
}
Conclusion
Ending with an extra bit of information about JavaScript functions…
The JavaScript Math object allows us to perform mathematical tasks on numbers. There are various math object properties.
Today I learned about Math.random, Math.floor Functions in JavaScript.
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