I'm confused on this What am i doing wrong?

Tell us what’s happening:

Your code so far

// Initialize these three variables
var a = 6;
var b = 15;
var c = c + "I am a String!";
a + b; 
c + 5;

// Do not change code below this line

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

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Link to the challenge:

While the tests are looking for the values 6, 15, and "I am a String!", you’re not supposed to initialize those variables with those values. The required values are in the instructions.

These lines aren’t really doing anything meaningful, so you can remove them.