Hint
+ prefers string concatenation when either side is a string. - always forces numeric conversion.
console.log(1 + '2');
console.log('3' - 1);
console.log(true + false);
console.log(null + 1);12 2 1 1
Explanation: 1+"2": + with string → "12". "3"-1: - forces numeric → 2. true+false: 1+0=1. null+1: null→0, 0+1=1.
Key Insight: + prefers string concatenation when either side is a string. - always forces numeric conversion.