Veld is a cellular stack-based language inspired by PostScript, Forth, Factor, and APL. Vectors and Grids are first-class stack values. Numeric words are overloaded across scalars, vectors, and grids, so grid grid + adds matching cells and grid 10 * scales the whole grid.

See the language reference for more details.

eval and dump take their source as exactly one shell argument.

.\veld.exe eval '1 2 + print'
.\veld.exe eval '"hello veld!" print'
.\veld.exe dump '"hello veld!" print'

The outer single quotes are PowerShell quoting. The inner double quotes are Veld syntax and are passed through to the language.

# Define Proc as Name `greet`
:greet { name ;
    "Hello " . name . "!" print
}

# Invoke Word `greet` with a string
"Veld" greet

# Define Grid as Name `a`
:a [
    1 2 3;
    4 5 6
] def

# Define Grid as Name `b`
:b [
    10 20 30;
    40 50 60
] def

# Print a + b
a b + print

Prints:

Hello Veld!
11 22 33
44 55 66