Developing Algorithms Using Strings

AP Computer Science A· difficulty 3/5

public static boolean isPal(String s) {
  int i = 0, j = s.length() - 1;
  while (i < j) {
    if (s.charAt(i) != s.charAt(j)) return false;
    i++; j--;
  }
  return true;
}
// call: isPal("racecar")

What does isPal("racecar") return?

A
$false$
B
$null$
C
$true$
check_circle
D
$compile error$

Explanation

"racecar" reads the same forwards and backwards.

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