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¥ is a currency sign used by the Chinese yuan (CNY) and the Japanese yen (JPY) currencies. This monetary symbol resembles a Latin letter Y or Greek letter upsilon (Υ υ) with a double stroke. The base unit of both currencies shared the same Chinese character (simplified Chinese: 圆; traditional Chinese: 圓; Shinjitai: 円) that means "circle". It is pronounced yuán in Mandarin Chinese and en in Standard Japanese. In mainland China, the Chinese character is more frequently written in everyday situations using the simpler character 元, which has the same pronunciation as the formal financial character 圆 in Chinese (but not in Japanese).
Code page 932
In the Japanese-language locales of Microsoft operating systems, the yen sign in code page 932 character encoding has the same byte value as the backslash in ASCII. It is also used wherever a backslash is used, such as the directory separator character and the general escape character, essentially making it a backslash with the appearance of a yen sign, a peculiarity that stems from JIS X 0201.
The Unicode code point is U+00A5 ¥ yen sign (HTML
Additionally, there is a double-width character (￥) at code point U+FFE5 ￥ fullwidth yen sign (HTML
￥ · In the block "Halfwidth and Fullwidth Forms") for use with wide fonts, especially east Asian fonts.