Overview

G is the seventh letter of the Latin alphabet and the English alphabet. It commonly represents the voiced velar stop sound, as in the word "go", but it can also represent other sounds in different contexts. The letter appears in both an uppercase form, G, and one or more lowercase forms, g. For a simple reference to its position see the numeral 7 and for general information about letters see letter.

Form and phonetics

Typographically, uppercase G is usually a single-stroke character resembling a circle with a horizontal or diagonal spur; lowercase g appears in two common typographic shapes: the "single-storey" form (used in many sans-serif fonts) and the "double-storey" form (common in serif typefaces). In English phonology G most often denotes the voiced velar stop /g/ (go, bag). Before front vowels (e, i, y) it often represents the affricate /dʒ/ (giant), or participates in digraphs and silent combinations (gnome, sign).

History and origin

The character traces its ancestry to the Semitic letter gimel, which passed into the Greek alphabet as gamma (Γ) and then into the Old Italic scripts. Latin initially used the letter C for both /k/ and /g/ sounds; at some point in early Roman orthography a modified form of C with an added stroke became a distinct letter to represent /g/. For background on the Latin and English alphabet development see English alphabet and Latin alphabet.

Common uses and examples

  • Phonetic examples: go (hard G), giant (soft G), gnome (silent G).
  • Science and notation: uppercase G can denote the gravitational constant; lowercase g often denotes gravitational acceleration.
  • Biology and chemistry: G is used as an abbreviation for the nucleotide guanine in genetics.
  • Culture and ratings: G is used as a content rating for general audience in some media classification systems.

Typographic and computing details

In modern character encodings the capital letter G has code points such as ASCII 71 and Unicode U+0047; the lowercase g is U+0067. Font designers pay special attention to the two different lowercase forms and to how G interacts with neighboring letters in typesetting. The letter remains a versatile grapheme with phonetic, symbolic, and practical roles across languages and disciplines.