Unicode Tutorials - Herong's Tutorial Examples - Version 5.21, by Dr. Herong Yang
What Is a Font?
A font can be considered as an instance of typeface that defines how glyphs of a character set will be displayed or printed.
What Is Font? A font is an instance of typeface that defines how glyphs of a character set will be displayed or printed. A font has the following basic properties:
Character Set - Specifies the list of characters that are supported by the font. For example, "Courier" fonts support the ASCII character set for the English language. "FangSong" fonts support the GB2312 character set for the Chinese language.
Size - Specifies the height of glyphs to be displayed or printed. For example, "12pt" fonts display glyphs 12/72, or 1/6, inch high. "32pt" fonts display glyphs half, or 1/2, inch high.
Weight - Specifies the thickness of glyph strokes relative to the font size. For example, glyph strokes in "Bold" weight fonts are thicker than glyph lines in "Normal" weight fonts.
Style - Specifies the slope of glyphs to be displayed or printed. For example, glyphs in "Italic" style fonts are slanted slightly to the right.
Family - Specifies a set of fonts that have same characteristics but different sizes, weights and styles. For example, "Courier" is a font family with fonts like, "Courier 12pt", "Courier 12pt bold", "Courier 12pt bold italic", etc.
The picture below shows some glyphs displayed in 3 fonts of the "Arial" family:
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