String Manipulations and queries in JavaScript
after a string variable was created as 
var myString = 'Guy Maimon'
Sending a query of will return explaination 
myString.length
 10 Returns the length of thestring 
myString[2]
 y Returns a specific char from a string (0 based) 
myString.indexof('imo')
 6 Returns where the typed string starts from
if not found, will return -1 
myString.includes('imo'))
 TRUE Returns TRUE if exists somewhere
otherwise Returns FALSE
 

if(myString.indexOf('Ma') !== -1)
{
    console.log("It's There");
}else{
    console.log("It's not There");
};
It's There if(myString.indexOf('test') !== -1)
Returns Ture if the exists in the string
if not found, will return -1 
myString.toLowerCase()
 guy maimon converst all text to lower case 
myString.toUpperCase()
 GUY MAIMON converst all text to upper case 
myString.slice(5)
 imon Returns string after cutting # chars
does not change the variable 
myString.slice(5,7)
 im Returns string after cutting #1 chars
Returns all the chars until #2
does not change the variable
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