Console.log output in javascript

Question

Why do console.log(00); and console.log(01); print 0 & 1 in the browser console and not 00 & 01?

console.log(00); // prints         


        

Answer 1

leading zero in console making it to base of 8.

console.log(00)=0
console.log(01)=1
console.log(011)=9 //0+8+1
console.log(0111)=73 //0+64+8+1