javascript
JavaScript | 用户定义函数的一些示例
1) Design a function, print message and assign the function to a variable and print it like a function
1)設(shè)計(jì)一個(gè)功能,打印消息并將該功能分配給變量,然后像打印功能一樣打印
<html lang="en"> <head><script>function hello(){document.write("Hello <Br />")}hello();a=hello;a();</script> </head> <body></body> </html>Output
輸出量
Hello Hello2) Call a function and then define it
2)調(diào)用一個(gè)函數(shù),然后定義它
<html lang="en"> <head><script>hello();function hello(){document.write("Hello <Br />")}</script> </head> <body></body> </html>Output
輸出量
Hello3) Define a function and call it in the body section
3)定義一個(gè)函數(shù)并在主體部分中調(diào)用它
<html lang="en"> <head><script>function hello(){document.write("Hello <Br />")}</script> </head> <body><script>hello();</script> </body> </html>Output
輸出量
Hello4) Call a function in head section and define it in the body section
4)在頭部分調(diào)用一個(gè)函數(shù),然后在主體部分定義它
<html lang="en"> <head><script>hello(); </script> </head> <body><script>function hello(){document.write("Hello <Br />")}</script> </body> </html>Output
輸出量
None: Function will not call5) Call a function and define it in the body section
5)調(diào)用函數(shù)并在主體部分中定義
<html lang="en"> <head><script></script> </head> <body><script>hello();function hello(){document.write("Hello <Br />")}</script> </body> </html>Output
輸出量
Hello翻譯自: https://www.includehelp.com/code-snippets/examples-of-user-defined-functions.aspx
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