The last one works even with negative numbers

Content

bool isEven(int x) switch(x) Case return true; case 1: return false; break bool isEven(int x) while (x 1) – 2 if (x: 0) return true; else return false; bool isEven(int x) if (x 2 0) return true; else return false; bool isEven (int x) return x 1;