How to convert full-width English characters into half-width English characters

In computers, full-width English characters and half-width English characters are two different ways of character representation. Full-width English characters are commonly used in Chinese input methods, while half-width English characters are the characters used in regular English input methods. Full-width English characters and half-width English characters are different in appearance. Full-width English characters are wider, while half-width English characters are narrower.

When processing text, sometimes it is necessary to convert full-width English characters into half-width English characters, so as to maintain the unity and consistency of the text. Let's discuss how to convert full-width English characters into half-width English characters.

The first thing to make clear is that there are certain rules for Unicode encoding between full-width English characters and half-width English characters. Generally speaking, the Unicode encoding value of a full-width English character differs from the corresponding half-width English character by a fixed value. Through this rule, we can convert full-width English characters into corresponding half-width English characters.

For example, the Unicode encoding of the English letter "A" in half-width characters is 65, and the Unicode encoding in full-width characters is 65296. The difference between them is 65296-65=65231. Then, if you want to convert the full-width English letter "A" into a half-width English letter "A", you only need to subtract 65248 from its Unicode encoding value.

In addition to English letters, numbers and some special characters also have corresponding full-width and half-width forms. By finding the Unicode encoding difference of the corresponding character, we can also convert full-width characters into half-width characters.

In addition, some text processing tools and programming languages ​​also provide corresponding functions or methods to convert full-width characters to half-width characters. When using these tools, you only need to call the corresponding function to complete the character conversion task, without manually calculating the Unicode encoding difference.

In general, converting full-width English characters into half-width English characters is not complicated. It can be achieved by calculating the Unicode encoding difference or using special tools. This makes it easier to process and analyze the text and ensure the consistency and standardization of the text.

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