Discussion: Oo Na Na Na
Execute the code to understand the output and gain insights into encountering NaN values in JavaScript.
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Verifying the output
Now, it's time to execute the code and observe the output.
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let price = 10;let tax;const sum = price + tax;console.log(sum);
Understanding the output
In this puzzle, the statement const tax; declares a constant variable without assigning any value to it. So, the variable holds a default value of undefined. When trying to add undefined to the value of price, the operation yields NaN (Not-a-Number).
NaN is a special value in JavaScript that represents the ...