JS Bin[String Manipulation]// source https://jsbin.com/gojoca

jsbin.gojoca.js

//String Manipulation//
/* String manipulation are the various ways to conveting strings*/
var hello = "Hello World!"

//Types of string manipulation functions//

//charAt() finds the character at a specified position (0 indexed)//
console.log(hello.charAt(2)); //consoles l//

//concat() combines one or more strings and returns the combined string//
console.log(hello.concat(" It'sa Me Mario!")); // Hello World! It'sa Me Mario!//

/* split() splits strings into an array of substrings. You can add a
* seperator inside the () to seperate them*/
console.log(hello.split( )); //["Hello World!']//
console.log(hello.split("")); //['H',"e","l",...]//

/* takes off a portion of a string starting at "start' until it reaches
* a specficed length*/
console.log(hello.substr(2)); // "llo World!"//

/* substring() extracts the characters within a string between 2 
*specified positions */
console.log(hello.substring(3,7)); // "lo W"//

/* toLowerCase() returns a string will all lowercase letters*/
console.log(hello.toLowerCase());// "hello world!"//

/*toUpperCase() returns a string will all uppercase letters*/
console.log(hello.toUpperCase()); // "HELLO WORLD!"//