Space occupied by 1. characters: full-width characters occupy two standard character positions, and half-width characters occupy one standard character position. Simply put, full-width characters are twice as wide as half-width characters.
2. Display internal code: full-width characters account for two bytes, and half-width characters account for one byte. This feature makes the storage and transmission requirements of the two different when writing code or processing text.
3. Character type: Full-width characters are mainly used for processing Chinese characters with equal width, such as Chinese punctuation marks and numbers. Half-width characters are mainly used for ASCII characters, that is, letters, numbers and characters input when there is no Chinese character input method.
4. Application scenario: When writing program code, only half-angle punctuation can be used in the source code. In word processing, especially when it comes to Chinese text, full-width characters are usually used.