I didn't understand the exercise where the function is used inside the for loop

JavaScript
1

Tell us what’s happening:

Your code so far


var printNumTwo;
for (var i = 0; i < 3; i++) {
  if (i === 2) {
    printNumTwo = function() {
      return i;
    };
  }
}
console.log(printNumTwo());
// returns 3

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User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.149 Safari/537.36.

Challenge: Compare Scopes of the var and let Keywords

Link to the challenge:

3

i couldn’t evaluate how the function is working inside the for loop. the function specified inside the for loop doesn’t have a name and the function called in the console.log, which function is it referring to?

5

So does it mean that assigning the variable printNumTwo with an anonymous function does give that function a name.

9

Oh yeah. thanx for the help. Didn’t knew the concept of anonymous function and function expression before. Now i’ve understood. Just a small doubt, do we need to type ‘use strict’; everytime we use let keyword. If so why?