Understanding Uninitialized Variables_string

Tell us what’s happening:
I put the correct undefined ```
" String!"

**Your code so far**


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

var a = 5;
var b = 10;
var c = " String!";

// Do not change code below this line

a = a + 1;
b = b + 5;
c = c + " String!";

Your browser information:

User Agent is: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.11; rv:63.0) Gecko/20100101 Firefox/63.0.

Link to the challenge:

Initialize the c with "I am a"

For instance if I initialize a variable with 5 like this :
var a =5; // this means that the initialized value for a is 5
if I just declare it like this :
var a; // means I declare it without any value , but here its initialized value is undefined
so the issue that you have is you are repeating declaring variables
if you declare a var you can change it like this :

var a ;
a=5 // here I should not write another time var a =5 because I did that before .