How to do it - I have tried to solve it but cannot find the solution

JavaScript
1

Tell us what’s happening:

Your code so far


// Only change code below this line
var a;
var b;
var c;
// Only change code above this line

a = a + 1;
b = b + 5;
c = c + " String!";
var a = 6;
var b = 10;
var c = undefined;
var a = 4;
var c = 5;
var c = "I am a"

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.116 Safari/537.36.

Challenge: Understanding Uninitialized Variables

Link to the challenge:

2

You must initialize each variable in its own declaration line.
That is enough:

// Only change code below this line
var a = 5;
var b = 10;
var c = "I am a";
// Only change code above this line

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