Pls what wrong with my code it's not working

1

Tell us what’s happening:

Your code so far

// Initialize these three variables
var a;
var b;
var c;

// Do not change code below this line

a = a + 1;
b = b + 5;
C = c + "string!";
a = 6;
b = 15;
c = "I am a!";

Your browser information:

Your Browser User Agent is: Mozilla/5.0 (Linux; Android 6.0; Infinix X510 Build/MRA58K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.111 Mobile Safari/537.36.

Link to the challenge:
https://www.freecodecamp.org/challenges/understanding-uninitialized-variables

2

Only change code above this:

// Do not change code below this line