js 学习之路6: if...else...条件语句的使用
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2022-07-09 15:07:40
1.1 if (...) { ... } else { ... } 1.2 if (条件1) { ... } else if (条件2) { ... } else { ... } ......
1.1
if (...)
{
...
}
else
{
...
}
<!doctype html> <html> <meta http-equiv="content-type" content="text/html; charset=utf-8"> <body> <script charset = "utf-8"> function myfunction(){ var x = 11; var y = x % 2; document.write(y + "<br>"); if (x % 2 == 1){ document.write("单数"); } else { document.write("双数"); } } myfunction(); </script> </body> </html>
1.2
if (条件1)
{
...
}
else if (条件2)
{
...
}
else
{
...
}
<!doctype html> <html> <meta http-equiv="content-type" content="text/html; charset=utf-8"> <body> <script charset = "utf-8"> function myfunction(x){ var y = x % 2; if (x % 2 == 0){ document.write("双数"); } else if (x > 10) { document.write("大于10的单数"); } else { document.write("普通单数"); } document.write("<br>"); document.write(x); } myfunction(15); </script> </body> </html>
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