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Everything about I

Ninth letter of the Latin alphabet

I is the ninth letter and the third vowel letter of the Latin alphabet, used in the modern English alphabet, the alphabets of other western European languages and others worldwide. Its name in English is i, plural i's or is. Wikipedia →

🧭 Start here: a 6-step reading path

  1. Read the overview: IA 5-minute orientation
  2. Pick up a classic book: War and PeaceThe most-reprinted book on the subject
  3. Go sideways: Small capital IA closely related topic
  4. Go sideways: EA closely related topic

📖 Definitions

Letter The ninth letter of the basic modern Latin alphabet.

Letter In the Turkish alphabet and its descendants, the lower-case form of dotted capital İ, which contrasts with ı as the lower-case form of dotless capital I.

Symbol The imaginary unit; a fixed square root of -1. Graphically, i is shown on the vertical (y-axis) plane.

Symbol The unit vector in the x direction.

🗂️ The subject at a glance

  1. Name
  2. History
  3. Use in writing systems
  4. Other uses
  5. Related characters
  6. Other representations

🏆 Landmark papers (most cited)

📚 Books worth reading

Ranked by number of editions on Open Library, a rough measure of how lasting a book is.

🔗 Related topics