Esharp1 gives the frequency of the note E-sharp in octave 1.
Esharp2 gives the frequency of the note E-sharp in octave 2.
Esharp3 gives the frequency of the note E-sharp in octave 3.
Esharp4 gives the frequency of the note E-sharp in octave 4.
Esharp5 gives the frequency of the note E-sharp in octave 5.
Esharp6 gives the frequency of the note E-sharp in octave 6.
Esharp7 gives the frequency of the note E-sharp in octave 7.
Like everything else in Mathematica, notebooks are ultimately symbolic expressions. When you edit notebooks—or apply high-level programmatic functions—Mathematica ...
Distributed[x, dist] or x \[Distributed] dist asserts that the random variable x is distributed according to the probability distribution dist.Distributed[{x_1, x_2, ...}, ...
FoldList[f, x, {a, b, ...}] gives {x, f[x, a], f[f[x, a], b], ...}.