Why do you guys not accept let variablename?

Question

I learned at school that defining variables with let is good programming practice. You don't need global variables everywhere.

Answer 1

Peter Bezak What you mean with "you guy dont accept let variable name"?

Answer 2

It is indeed good practice. Also, it does work here:

https://code.sololearn.com/WXRSOFKT0k2s/#js