In this example, you enter a character from the keyboard and the program checks if the input character is a letter.

在这个范例中，由键盘输入一个字元后，程序会检查输入的字元是否为字母。

youdao

In this example, you enter a character from the keyboard and the program checks if the input character is an alphabetic character.

此示例检查输入字符是否是小写字符、大写字符或数字。

youdao

youdao

When you first enter Oasis, you encounter a character straight out of Fear and Loathing in Las Vegas, which is fitting given the Vegasesque Oasis.

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Don't get us wrong -- we applaud RIM's efforts to officially enter into the dangerous world of 140-character social networking -- but when it comes to a integrating a service that can dominate your life with a device that's intended to simplify it, efficiency isn't just important, it's vital.

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