freeCodeCamp/guide/chinese/swift/functions/index.md

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---
title: Functions
localeTitle: 功能
---
## 功能
Swift中的函数由参数和返回类型组成。可以使用以下基本结构创建函数 \`\`\`斯威夫特 func sayHellonameOfPersonString - > String { let hello =“Hello”+ nameOfPerson +“。” 打印(你好) }
sayHellonameOfPerson“史蒂夫” ` `` In this example, the function sayHello takes in a string name and prints out the phrase` “HelloSteve。”。
## 功能参数
函数不需要任何输入参数或返回类型。但是,在命名函数后,这需要括号。 \`\`\`斯威夫特 func helloSteve{ 打印(“你好,史蒂夫。”) }
helloSteve//打印出“HelloSteve”。 \`\`\`