JuniorTheoryCommon

What does the program print?

JavaScript

console.log("5" + 3, "5" - 3, "5" * "2");

53 2 10

Expecting 8 for "5" + 3: when one side of + is a string, + joins strings instead of adding, so the number 3 becomes "3" and the result is "53".
Expecting NaN from - or * with strings: these operators work only with numbers, so they turn "5" and "2" into 5 and 2 first.