U039A

U039A is the Unicode designation for the code point U+039A, which represents the Greek capital letter Kappa (Κ). It resides in the Greek and Coptic block of the Unicode standard, spanning from U+0370 to U+03FF. In the ancient Greek alphabet, Kappa corresponds to the voiceless velar plosive /k/ and is the tenth letter.

In Greek numerals, Kappa carries the value one hundred, a system that assigned numeric values to letters from the Greek alphabet. The letter is employed in modern Greek orthography, writing the sound /k/, as in the word κέλευση (κελεύση – command). It also appears in transliterations of Greek text into Latin characters, where it is rendered as "K".

Outside of Greek, the character is used in mathematics and scientific notation. In many fields it denotes a constant, often called kappa, such as in statistics where κ represents Cohen’s kappa coefficient, or in physics where κ may indicate a curvature or opacity factor. The shape of the uppercase Kappa has influenced the design of several typographic fonts, and its lowercase form λ (lambda) is also commonly used but is a distinct Unicode character.

Because the Unicode standard encodes character shapes rather than meaning, the visual form of U039A is rendered consistently across systems that support the Greek and Coptic block, but variations can appear in fonts that choose different glyph designs for stylistic purposes.