javascript Number code example

Example 1: Javascript string to int

var myInt = parseInt("10.256"); //10
var myFloat = parseFloat("10.256"); //10.256

Example 2: int val javascript

var my_number = "43";
console.log(parseInt(my_number)); // result: 43

//syntax: parseInt(string, base);
parseInt("F", 16); // result: 15
parseInt("17", 8); // result: 15
parseInt("15", 10); // result: 15
parseInt(15.99, 10); // result: 15
parseInt("FXX123", 16); // result: 15
parseInt("1111", 2); // result: 15
parseInt("15*3", 10); // result: 15
parseInt("12", 13); // result: 15

Example 3: javascript to number

parseInt("1")

Example 4: javascript number length

var num = 1234
number.toString().length; // 4

Example 5: js numbers

// Numbers:
1;
-99;
0.345345;

//Making variables with let:
let numberOfFriends = 1;

//Incrementing:
numberOfFriends += 3; //numberOfFriends is now 4

// Variables with const
const minimumAge = 21; //CANNOT REASSIGN!

//Booleans - true or false values
true;
false;
let isHappy = true;

//Naming Conventions
// Use upper camel-cased names:
let numberOfChickens = 6; //GOOD
// NOT THE JS WAY:
// let number_of_chickens = 6;

Example 6: js int

var myInt = 69420

1+1//int
1+"1"//string