3 (AndrewBayly)

Not to be confused with 3 (islptng) (a language discovered by islptng), or a joke language named "3" where every program prints "3". See 6.

3 is an esoteric programming language which is a subset of JavaScript. In 3, every sequence of 3 consecutive characters must contain at least one 3.

Sample Programs

Hello, world!

_3='3f3i3n3d3c3o3s3t3r3u3e3l3.3g3(3"3H3 3W3r3)3!3'
3
f3=_3[3/3]
3
i3=_3[3]
3
n3=_3[3+3/3+3/3]
3
d3=_3[3+3+3/3]
3
c3=_3[3*3]
3
o3=_3[3*3+3/3+3/3]
3
s3=_3[3*3+3+3/3]
3
t3=_3[3*3+3+3]
3
r3=_3[3*3+3*3-3/3]
3
u3=_3[3*3+3*3+3/3]
3
e3=_3[3*3+3*3+3]
3
l3=_3[3*3*3-3-3/3]
3
D3=_3[3*3*3-3+3/3]
3
g3=_3[3*3*3]
3
O3=_3[3*3*3+3-3/3]
3
Q3=_3[3*3*3+3+3/3]
3
H3=_3[3*3*3+3+3]
3
S3=_3[3*3*3+3*3-3/3]
3
W3=_3[3*3*3+3*3+3/3]
3
r3=_3[3*3*3+3*3+3]
3
C3=_3[3*3*3+3*3+3+3-3/3]
3
E3=_3[3*3*3+3*3+3+3+3/3]
3
F33=f3+i3+n3+d3
C33=c3+o3+n3+s3+t3+r3+u3+c3+t3+o3+r3
a33=c3+o3+n3+s3+o3+l3+e3+D3+l3+o3+g3+O3+Q3+H3+e3+l3+l3+o3+S3+W3+o3+r3+l3+d3+E3+Q3+C3
b33=[3]
3
c33=b33[F33]
3
d33=c33[C33]
3
e33=d33(a33)
3
f33=e33(3)
3

Computational class

Arbitrary integers can be built from 3+-/ by adding and subtracting 3/3. You can then get most characters by doing this:

q3="3\"3"[3/3]
3

The remaining characters can be done like so:

// Assuming A3 contains "A", b3 contains "b", etc.
a33=A3[c3+o3+n3+s3+t3+r3+u3+c3+t3+o3+r3][3,f3+r3+o3+m3+C3+o3+d3+e3+P3+o3+i3+n3+t3](3/3+3/3+3/3+[...])
3

This allows for arbitrary JS to be run, which proves that 3 is Turing-complete:

F33="3"[3,a3+t3][3,c3+o3+n3+s3+t3+r3+u3+c3+t3+o3+r3]
3
F33([...])(3)