Variable

Variable is a 3D grid-based esoteric programming language created by User:Pineapple. It is an extension of 9x9x9 (which in it's self is a variation of 3x3x3 ), featuring a memory layout consisting of a 9x9x9 cube (729 memory cells total) alongside additional control flow, cell manipulation, and I/O commands.

Overview

Memory is arranged in nine layers, with layer 1 at the bottom and layer 9 at the top. Each cell is referenced by a coordinate system consisting of a row, column, and layer.

Commands consist of a prefix character followed by 3-digit coordinates: XRCL or 4-digit numeric additions: VRCL

• V: The value being added (1–9).
• R: The target row (1–9).
• C: The target column (1–9).
• L: The target layer (1–9).

For example, 1111 adds the digit 1 to row 1, column 1, layer 1.

Values in cells accumulate. If you run 5111 twice, the value at position 111 becomes 10.

Commands

Variable retains all original numeric addition commands from 9x9x9 while adding specialized operations:

• VRCL: Adds digit V (1–9) to cell at RCL.
• 0000: Prints the ASCII character value of each memory position, following reading order from layer 9 down to layer 1.
• SVRCL: Subtracts digit V from target cell at RCL.
• CRCL: Clears the cell at RCL (sets value to 0).
• DRCL: Decrements the cell at RCL by 1.
• JRCL / KRCL: Jump loop conditional on target cell at RCL being non-zero.
• MRCL / PRCL: Mark source cell at RCL / Paste copied value into target cell at RCL.
• ORCL: Outputs target cell at RCL as an ASCII character.
• URCL: Outputs target cell at RCL as a raw number.
• RRCL: Reads user input into cell at RCL.

Memory layout

When executed, the program reads memory cells in the following order:

Layer 9

119 129 139 ... 199
219 229 239 ... 299
...
919 929 939 ... 999

Layer 8

118 128 138 ... 198
218 228 238 ... 298
...
918 928 938 ... 998

Layer 7

117 127 137 ... 197
217 227 237 ... 297
...
917 927 937 ... 997

Layer 6

116 126 136 ... 196
216 226 236 ... 296
...
916 926 936 ... 996

Layer 5

115 125 135 ... 195
215 225 235 ... 295
...
915 925 935 ... 995

Layer 4

114 124 134 ... 194
214 224 234 ... 294
...
914 924 934 ... 994

Layer 3

113 123 133 ... 193
213 223 233 ... 293
...
913 923 933 ... 993

Layer 2

112 122 132 ... 192
212 222 232 ... 292
...
912 922 932 ... 992

Layer 1

111 121 131 ... 191
211 221 231 ... 291
...
911 921 931 ... 991

I/O

• 0000: Prints the ASCII character value of each memory position, following the reading order from layer 9 down to layer 1.
• ORCL: Outputs character at position RCL.
• URCL: Outputs numerical value at position RCL.
• RRCL: Reads input directly into position RCL.

Example programs

Setting coordinates

These commands demonstrate targeting specific positions on layer 1:

1111  
1121  
1131  
1211  
1311

Computational class

Turing complete (due to conditional jumping and unbounded or variable manipulation).

External resources

• No external resources yet.