freeCodeCamp/guide/chinese/go/if-else-statements/index.md

title, localeTitle

title	localeTitle
if else Statements	如果是其他声明

介绍

if指定的条件为true ， if语句执行语句。如果条件为false ，则可以使用else语句执行另一个语句。

注意： else语句是可选的。

  x := 7 
  if x%2 == 0 { 
    // This statement is executed if x is even 
  } else { 
    // This statement is executed if x is odd 
  } 

可以嵌套多个if...else语句来创建else if子句。

  x := 7 
  if x == 2 { 
    // this statement is executed if x is 2 
  } else if x == 4 { 
    // this statement is executed if x is 4 
  } else if x == 7 { 
    // this statement is executed if x is 7 
  } else { 
    // this statement is executed if none of the aboves is true 
  } 

在Go中，您可以在if条件之前加上语句。然后，包含的变量定义对完整的if块有效。

  if x := 3; x == 2 { 
    // this statement is executed if x is 2 
  } else if x == 3 { 
    // this statement is executed if x is 3 
  } else { 
    // this statement is executed if none of the aboves is true 
  }