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Console is used to log the information about variables , array , object ,prototype ,debugging ,overwrite variable data or assign data at a real time and log message in Browsers
Example
/** display properties and methods of array *//
console.dir(Array);
How to open console in browsers
In the most browser , the javascript console integrated within the Developer Tools .
1 - Chrome
Open console in chrome browser
window / Linux - Ctrl + Shift + I
Mac Os - Cmd +Opt + J
2 - Firefox
Open console in firefox browser
window / Linux - Ctrl + Shift +I
Mac Os - Cmd + Opt +K
3 - Edge and Internet Explorer
open console in Edge and Internet explorer from Developer Tools
4 - Safari
Before opening console in safari . you need to check Developer menu enable or not if Developer menu not enable , then go to preferences and advanced setting and at the bottom to clicked Developer menu
after enable this Developer tool to press - Cmd + Option + C
5 - Opera
open console in opera browser.
Press - Ctrl + Shift + I
Browsers debugging console is generally used by Developers to identify errors , understanding code flow and execution , expand prototype , log object property and its methods