CODEWITHSUNDEEP
javascriptnode.jsnan
joshua-anderson
joshua-anderson

Reputation: 4466

Why are two numbers subtracted from each other causing a NAN

I'm working on the following nodejs javascript code. I am subtracting two valid numbers from each other and receiving NAN as a result.

Any clues why this is?

stringLength = process.stdout.colums - "Spaces: aa".length;
console.log(process.stdout.columns); //returns 80
console.log("Spaces: aa".length); //returns 10
console.log(eval(process.stdout.colums - "Spaces: aa".length)); //returns NAN
console.log(stringLength); //returns NAN

Thanks for the help.

Upvotes: 0

Views: 724

Answers (1)

PSL
PSL

Reputation: 123739

I think its the typo (colums v/s columns) that is causing the issue.

process.stdout.colums - "Spaces: aa".length; // undefined - 10 = NaN | Always, not even Evil (eval) can help

should be

process.stdout.columns - "Spaces: aa".length;

Upvotes: 4

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