How to concatenate the undefine string

[muzammilahmed2023]

Tell us what’s happening:
Describe your issue in detail here.

Your code so far

// Only change code below this line
var a=0;
var b=0;
var c=0;

a = 5;
b = 10;
c = undefined;
c= ''+'Iam a';



// Only change code above this line

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

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Challenge: Understanding Uninitialized Variables

Link to the challenge:

freeCodeCamp.org

[skamat]

c should not be set to undefined. Please remove that line. You need to set c to ‘I am a’ only. So when it is concatenated with " String!", it reads “I am a String!”.

Also, there should be space between the words, I and am.

[eoja]

Initialize the three variables a , b , and c with 5 , 10 , and "I am a" respectively so that they will not be undefined .

You initialized them all to zero which was unnecessary.

@muzammilahmed2023

var a=0;
var b=0;
var c=0;

And then subsequently redefined them “close” to what they should be as previously mentioned.

@muzammilahmed2023

a = 5;
b = 10;
c = undefined;
c= ''+'Iam a';

You can just initialize the variable like var a = 5; And so on.

Here you redefine c:

@muzammilahmed2023

c = undefined;

And on the next line redefine it again:

@muzammilahmed2023

c= ''+'Iam a';

Normally setting c to undefined there might not cause a problem but the tests here are looking to check c is not undefined, but you did just that so the test fails.

Also, another thing that might not cause an issue but is unnecessary is assigning a string value to a variable by doing this:

@muzammilahmed2023

''+'Iam a';

It can just simply be ‘I am a’.