有趣的if else

   看下面java代码,调用getString(1)时输出?

class Test {
  public String getString(int a) {
    String str = "by sea";

    if(a>0)
      if(a>1) str = "by land";
    else str = "";

    return str;
  }
}

    答案是"",不是"by sea"。像c/java之类的语言代码缩进对语义没影响，该else语句匹配最近的if结构。当然上面是段非常不标准的代码，原意是想输出"by sea",所以最好要加{，}

 

    对于python这种强缩进的语言，当然输出"by sea"：

#!/usr/bin/python

def getString(a):
  str = "by sea"
  if a>0:
    if a>1: str = "by land"
  else: str = ""

  return str


print getString(1)