Why we are executing the function names despite having the consol.log() statement?

Question

Previously document.write() or console.log() was enough to show the output without executing any function names?
We are using varTest() and letTest() end of this code to get the desired output.(ES6)
https://code.sololearn.com/W1a0NCSG3WDI/?ref=app

Answer 1

In the top of the script, you ***define*** the function.

The last 2 lines ***call*** the functions, that means they are executed when you run the code.

Simply defining a function doesn't execute it. If you removed the last 2 lines, you wouldn't see any output.