5 exercises on pronouncing Greek letters used in code and math aloud.
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How is "lambda" (λ) pronounced?
lambda is pronounced "LAMB-duh" /ˈlæmdə/ — two syllables, stress on the first, with a silent "b" (as in the word "lamb"), then a schwa "-duh." So "a LAMB-duh function", "an AWS LAMB-duh." In coding it means an anonymous function. Do not sound the "b" separately or spell it out. The Greek letter λ gives its name to lambda calculus.
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How is "sigma" (Σ / σ) pronounced?
sigma is said "SIG-muh" /ˈsɪɡmə/ — two syllables, stress on the first, short /ɪ/ vowel, hard /ɡ/, ending in a schwa. So "the sigma symbol for summation", "six-SIG-muh quality." The capital Σ means "sum" in math; lowercase σ often means standard deviation. Do not use a long "i" ("SY-muh") or stress the second syllable.
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How is "delta" (Δ / δ) pronounced?
delta is pronounced "DELL-tuh" /ˈdɛltə/ — two syllables, stress on the first, short /ɛ/ vowel (as in "bed"), ending in a schwa, the same as the airline or a river delta. So "compute the delta", "a delta of five percent." In tech Δ usually means "change" or "difference." Do not lengthen the "e" or stress the second syllable.
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How is "epsilon" (ε) pronounced?
epsilon is commonly said "EP-suh-lon" /ˈɛpsɪlɒn/ — three syllables, stress on the first, short /ɛ/ at the start. (A British variant is "ep-SY-lon" with stress on a long-i second syllable.) So "within epsilon of the target", "a small epsilon for floating-point comparison." In code ε often denotes a tiny tolerance value. Do not spell it out.
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How is "theta" (θ) pronounced?
theta is pronounced "THEE-tuh" /ˈθiːtə/ — two syllables, stress on the first, with the voiceless "th" /θ/ (as in "thin," not "this"), a long /iː/ vowel, and a final schwa. So "the angle theta", "big-O of THEE-tuh-n for tight bounds." The Greek letter θ often denotes an angle. Do not use a hard /t/ ("TAY-tuh") or a short "e."