Go语言关系运算符

下表显示了Go语言支持的所有关系运算符。假设变量A的值为10，变量B的值为20，则：

运算符	描述	示例
==	检查两个操作数的值是否相等，如果相等，则条件为真。	(A == B)结果为假
!=	检查两个操作数的值是否相等，如果值不相等，则条件为真。	(A != B)结果为真
>	检查左操作数的值是否大于右操作数的值，如果是，则条件为真。	(A > B)结果为假
<	检查左操作数的值是否小于右操作数的值，如果是，则条件为真。	(A < B)结果为真
>=	检查左操作数的值是否大于或等于右操作数的值，如果是，则条件为真。	(A >= B)结果为假
<=	检查左操作数的值是否小于或等于右操作数的值，如果是，则条件为真。	(A <= B)结果为真

示例

尝试以下示例来了解Go编程语言中提供的所有关系运算符：

package main

import "fmt"

func main() {
   var a int = 21
   var b int = 10

   if( a == b ) {
      fmt.Printf("Line 1 - a is equal to b\n" )
   } else {
      fmt.Printf("Line 1 - a is not equal to b\n" )
   }
   if ( a < b ) {
      fmt.Printf("Line 2 - a is less than b\n" )
   } else {
      fmt.Printf("Line 2 - a is not less than b\n" )
   } 

   if ( a > b ) {
      fmt.Printf("Line 3 - a is greater than b\n" )
   } else {
      fmt.Printf("Line 3 - a is not greater than b\n" )
   }
   /* Lets change value of a and b */
   a = 5
   b = 20
   if ( a <= b ) {
      fmt.Printf("Line 4 - a is either less than or equal to  b\n" )
   }
   if ( b >= a ) {
      fmt.Printf("Line 5 - b is either greater than  or equal to b\n" )
   }
}

当编译和执行上面程序，它产生以下结果：

Line 1 - a is not equal to b
Line 2 - a is not less than b
Line 3 - a is greater than b
Line 4 - a is either less than or equal to  b
Line 5 - b is either greater than  or equal to b

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