Alpha ET: post #1203 — TG.ME

For those who were confused this is all JavaScript. Remember: when you use the + operator with a string, JS does concatenation, not addition. Example from the quiz: 5 + "3" becomes "53". But with the - operator, JS converts strings to numbers, so "10" - 3 becomes 7. Also keep in mind truthy and falsy values: 0, "", null, undefined, false, and NaN are falsy, while things like "0" or [] are truthy. @alphaETHub