Editing Isopsephy (section)

==Letter values of the Greek alphabet==
In Greek, each unit (1, 2, ..., 9) was assigned a separate letter, each tens (10, 20, ..., 90) a separate letter, and each hundreds (100, 200, ..., 900) a separate letter. This requires 27 letters, so the 24-letter alphabet was extended by using three obsolete letters: [[digamma]] {{lang|grc|ϝ}} (also used are [[Stigma (letter)|stigma]] {{lang|grc|ϛ}} or, in modern Greek, {{lang|el|στ}}) for 6, [[qoppa]] {{lang|grc|ϙ}} for 90, and [[sampi]] {{lang|grc|ϡ}} for 900.

This alphabetic system operates on the additive principle in which the numeric values of the letters are added together to form the total. For example, 241 is represented as σμα (200 + 40 + 1).

{| class="wikitable" style="text-align:center;"
! Letter (upper <br>and lower case) || Value || Name || Trans- <br>literation 
|-
| '''{{lang|grc|Α α}}''' || 1 || [[Alpha (letter)|Alpha]] || a
|-
| '''{{lang|grc|Β β}}''' || 2 || [[Beta (letter)|Beta]] || b
|-
| '''{{lang|grc|Γ γ}}''' || 3 || [[Gamma]] || g
|-
| '''{{lang|grc|Δ δ}}''' || 4 || [[Delta (letter)|Delta]] || d
|-
| '''{{lang|grc|Ε ε}}''' || 5 || [[Epsilon]] || e
|-
| ('''{{lang|grc|Ϝ ϝ / Ϛ ϛ}}''') || 6 || [[Digamma]] (later [[Stigma (letter)|Stigma]])|| w / st
|-
| '''{{lang|grc|Ζ ζ}}''' || 7 || [[Zeta]] || z
|-
| '''{{lang|grc|Η η}}''' || 8 || [[Eta (letter)|Eta]] || ē
|-
| '''{{lang|grc|Θ θ}}''' || 9 || [[Theta]] || th
|-
| '''{{lang|grc|Ι ι}}''' || 10 || [[Iota]] || i
|-
| '''{{lang|grc|Κ κ}}''' || 20 || [[Kappa]] || k
|-
| '''{{lang|grc|Λ λ}}''' || 30 || [[Lambda]] || l
|-
| '''{{lang|grc|Μ μ}}''' || 40 || [[Mu (letter)|Mu]] || m
|-
| '''{{lang|grc|Ν ν}}''' || 50 || [[Nu (letter)|Nu]] || n
|-
| '''{{lang|grc|Ξ ξ}}''' || 60 || [[Xi (letter)|Xi]] || x
|-
| '''{{lang|grc|Ο ο}}''' || 70 || [[Omicron]] || o
|-
| '''{{lang|grc|Π π}}''' || 80 || [[Pi (letter)|Pi]] || p
|-
| ('''{{lang|grc|Ϙ ϙ}}''') || 90 || [[Koppa (letter)|Koppa]] || q
|-
| '''{{lang|grc|Ρ ρ}}''' || 100 || [[Rho (letter)|Rho]] || r
|-
| '''{{lang|grc|Σ σ}}''' || 200 || [[Sigma]] || s
|-
| '''{{lang|grc|Τ τ}}''' || 300 || [[Tau]] || t
|-
| '''{{lang|grc|Υ υ}}''' || 400 || [[Upsilon]] || y
|-
| '''{{lang|grc|Φ φ}}''' || 500 || [[Phi (letter)|Phi]] || ph
|-
| '''{{lang|grc|Χ χ}}''' || 600 || [[Chi (letter)|Chi]] || ch
|-
| '''{{lang|grc|Ψ ψ}}''' || 700 || [[Psi (letter)|Psi]] || ps
|-
| '''{{lang|grc|Ω ω}}''' || 800 || [[Omega]] || ō
|-
| ('''{{lang|grc|Ϡ ϡ}}''') || 900 || [[Sampi]] || ts
|}