Wait, why did all functions return 2?

The lambdas don’t capture the value of i at each loop iteration, they capture the variable itself. By the time you call the functions, the loop has finished, and i is left at its final value, 2.

This is called late binding and can cause unexpected behavior when creating closures inside loops.

So as a quick tip, Bind the current value at definition time using a default argument(like shown in the second image) Then each lambda remembers its own i value independently.