what does 0X mean? [duplicate]

Answer 1

Yes, it means the value that comes after '0x' is interpreted as a hexadecimal value.

var a = 0x123;
console.log(a); // output is ((16^2)*1) + ((16^1)*2) + ((16^0)*3) = 291

See also What do numbers using 0x notation mean

Hope that helped.

Answer 2

Yes, it means the following value is in hexadecimal:

var num = 0xFF; //255  -  1111 1111

Answer 3

0x is how you denote a hexadecimal string in JavaScript, e.g. 0xFFFFFF

Answer 4

It means the subsequent characters in the token should be interpreted as heXadecimal

0x20

means the decimal value

32