41 lines
800 B
Markdown
41 lines
800 B
Markdown
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---
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title: Ternary operator
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localeTitle: 三元运算符
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---
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# 三元运算符（ `?:` :)
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三元运算符根据条件返回两个表达式中的一个。它可以用作if ... else语句的快捷方式。
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## 句法
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```
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condition_expression ? expression_1 : expression_2
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```
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### 参数
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`condition_expression` 布尔表达式。
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`expression_1` 如果`condition_expression`为true，则返回。
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`expression_2` 如果`condition_expression`为false，则返回。
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## 例
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```
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// initialize - set true or false here to view different result
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bool hasFreeSweet = false;
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string str = hasFreeSweet ? "Free sweet!" : "No free sweet.";
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//output in console
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Console.WriteLine(str);
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```
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## 产量
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```
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if hasFreeSweet == true
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> Free sweet!
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if hasFreeSweet == false
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> No free sweet.
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```
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