<awangdev>509. Fibonacci Number_1.java
public int fibonacci(int n) {
        if (n <= 1) {
            return 0;
        }
        int first = 0;
        int second = 1;
        for (int i = 2; i < n; i++) {
            int temp = second;
            second = first + second;
            first = temp;
        }
        return second;
    }
public int sample_funcname ( int var_0 ) {
  if ( var_0 <= 1 ) {
    return 0 ;
  }
  int var_3 = 0 ;
  int var_4 = 1 ;
  for ( int var_6 = 2 ;
  var_6 < var_0 ;
  var_6 ++ ) {
    int var_7 = var_4 ;
    var_4 = var_3 + var_4 ;
    var_3 = var_7 ;
  }
  return var_4 ;
}
