JavaScript Type Conversion

Converting Strings to Numbers
Converting Numbers to Strings
Converting Dates to Numbers
Converting Numbers to Dates
Converting Booleans to Numbers
Converting Numbers to Booleans

Converting Strings to Numbers

In JavaScript, you can convert strings to numbers using various methods. Here are some common ways to do it:

Using parseInt() and parseFloat():
Using the Unary Plus Operator (+):
Using Number() constructor:
Using the *1 or /1 trick:

Converting Numbers to Strings

In JavaScript, you can convert numbers to strings using various methods. Here are some common ways to do it:

Using the String() function:
Using the toString() method:
Using string concatenation:
Using template literals:

Converting Dates to Numbers

Converting dates to numbers in JavaScript typically involves obtaining the timestamp representation of the date. A timestamp represents the number of milliseconds elapsed since January 1, 1970, 00:00:00 UTC (the Unix Epoch).
Here's how you can convert dates to numbers:

Using the getTime() Method:

Converting Dates to Strings

In JavaScript, you can convert dates to strings using various methods to represent the date in a human-readable format. Here are some common ways to do it:

Method	Description
getDate()	Get the day as a number (1-31)
getDay()	Get the weekday a number (0-6)
getFullYear()	Get the four digit year (yyyy)
getHours()	Get the hour (0-23)
getSeconds()	Get the seconds (0-59)
getMinutes()	Get the minutes (0-59)
getMilliseconds()	Get the milliseconds (0-999)
getTime()	Get the time (milliseconds since January 1, 1970)
getMonth()	Get the month (0-11)

Converting Booleans to Numbers

Converting Booleans to Numbers in JavaScript is straightforward because JavaScript automatically coerces Boolean values to numbers when they are used in numeric contexts. Here's how you can convert Booleans to numbers:

Example

let boolTrue = true;
let boolFalse = false;

let numTrue = boolTrue * 1; // 1
let numFalse = boolFalse * 1; // 0

Converting Booleans to Strings

In JavaScript, you can convert Booleans to strings using various methods. Here are some common ways to do it:

Example

let boolTrue = true;
let boolFalse = false;

let strTrue = boolTrue.toString(); // "true"
let strFalse = boolFalse.toString(); // "false"

Basic Structure

Automatic Type Conversion

Automatic type conversion, also known as type coercion, is a feature in JavaScript where the runtime automatically converts values from one data type to another when needed.
This process occurs implicitly, without explicit instructions from the programmer. JavaScript employs type coercion in various scenarios, such as arithmetic operations, comparisons, and concatenations.

Arithmetic Operations:

Example

let num = 5;
let str = "10";

let result = num + str; // result is "510"

Comparisons:

Example

let num = 10;
let str = "10";

console.log(num == str); // true

Concatenation:

Example

let num = 10;
let str = "The value is: ";

let result = str + num; // result is "The value is: 10"

Logical Operations:

Example

let num = 10;

if (num) {
    console.log("Number is truthy");
} else {
    console.log("Number is falsy");
}