Sleep debt calculator : undefined get printed in console

Here is the code above. On running it in console, an extra ‘undefined’ string below the actual log appears. There is something wrong, but I can’t figure out. Help me, please.:blush:

Hello! This is due to the fact there are no return statements in the calculateSleepDebt function. When you log this function at the end, it is called-so all of the console.log()s are printed, and, since there is no return, the default return value from a function is undefined, so that is what you are printing when you do console.log(calculateSleepDebt(9)).
I hope this helps!

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Thanks for the help I got it.

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