Sushi (sushi)

Sushi is an esoteric programming language based on an infinite number of stacks, created in 2026 by User:Sushi with the goal of being an atypical language. It has the following commands:

Command	Description
Stack manipulation
Cps	1. Duplicate the top element of stack s.
Swstt	2. Swap the top elements of stacks s and t.
Rtsnn	3. Rotate stack s by n positions (negative = reverse direction).
Rvs	4. Reverse stack s.
Mvstt	5. Move the top element of s to t.
Mgstt	6. Merge all of s onto t, emptying s.
Cls	7. Clear stack s.
Szs	8. Push the size of s onto s.
Pksnn	9. Push a copy of the n-th element from the top of s onto s.
Spstt	10. Split s in half; the upper half goes to t.
Ilstt	11. Interleave s and t into s.
Dds	12. Remove duplicate values from s (first occurrence stays).
Sts	13. Sort s ascending.
Shs	14. Shuffle s.
Mrstt	15. Copy s into t in reverse order.
Dps	16. Delete the bottom element of s.
Ibsxx	17. Insert x at the bottom of s.
Lks	18. Lock s: all pushes and pops on it are ignored.
Uks	19. Unlock s.
Frs	20. Freeze the top element of s: pop skips it.
Arithmetic
Ads	21. Pop two elements, push their sum.
Sbs	22. Pop two, push the difference (second − top).
Mls	23. Pop two, push the product.
Dvs	24. Pop two, push the quotient. On division by zero, push the stack number instead.
Mds	25. Pop two, push the remainder.
Pws	26. Pop two, push second to the power of top.
Sqs	27. Square root of the top; if negative, push it to stack -s instead.
Abs	28. Absolute value of the top.
Ngs	29. Negate the top.
Gcs	30. Pop two, push their GCD.
Lcs	31. Pop two, push their LCM.
Fcs	32. Replace the top with its factorial.
Fbs	33. Replace the top with the n-th Fibonacci number.
Pfs	34. Replace the top with its prime factors (smallest on top).
Rdsnn	35. Round the top to n decimal places.
Control flow
Ifs … Fi	36. Run the block if the top of s is non-zero.
Uns … Nu	37. Run the block unless the top of s is non-zero.
Lpsnn … Dn	38. Repeat the block n times.
Whs … Hw	39. Repeat the block while s is not empty.
Br	40. Break out of the innermost loop.
Skn	41. Skip the next n commands.
Lbl	42. Define label l.
Jml	43. Jump to label l.
Fnname … Nf	44. Define a function.
Caname	45. Call a function.
Rn	46. Return from a function.
Eqs	47. Pop two, push 1 if equal, otherwise 0.
Lts	48. Pop two, push 1 if second < top.
Gts	49. Pop two, push 1 if second > top.
Nts	50. Logical NOT of the top.
Input / output
Prs	51. Print the top of s without popping.
Pns	52. Pop the top of s and print it with a newline.
Pas	53. Print the whole stack as a list.
Chs	54. Print the top as an ASCII character.
Rcs	55. Read a single character into s.
Rls	56. Read a line and push it as character codes.
Rfnamess	57. Read a file's contents into s.
Wfnamess	58. Write stack s to a file.
Ar	59. Push command-line arguments onto stack 0.
Ectext	60. Print the literal text.
Ers	61. Print the top of s to the error stream.
Bl	62. Ring the terminal bell.
Strings
Sjs	63. Concatenate the top two strings.
Lns	64. Push the length of the top string.
Ups	65. Convert the top string to uppercase.
Lws	66. Convert the top string to lowercase.
Rss	67. Reverse the top string.
Srsaabb	68. Replace every a with b in the top string.
Css	69. Convert character codes on s into a string.
Scs	70. Convert the top string into character codes.
Pds	71. Push 1 if the top string is a palindrome, otherwise 0.
Cnscc	72. Count occurrences of c in the top string.
Trs	73. Trim whitespace from the top string.
Rosnn	74. Apply ROT-n to the top string.
Stack ecosystem and meta
Nw	75. Create a new stack and push its number onto the current one.
Dls	76. Destroy stack s; its contents scatter to random stacks.
Ls	77. List all non-empty stacks.
Bks	78. Take a snapshot of s.
Res	79. Restore s from its last snapshot.
Uds	80. Undo the last operation on s.
Rps	81. Redo the last undone operation on s.
Alstt	82. Make s an alias of t.
Tps	83. Teleport the top of s to a random stack from -100 to 100.
Evs	84. Evaluate the top string as Sushi code.
Qn	85. Print the program's own source code.
Ht	86. Halt the program.
Sln	87. Sleep for n milliseconds.
Cmtext	88. Comment (ignored).
Randomness and time
Rgsaabb	89. Push a random integer from a to b.
Cfs	90. Coin flip: push 0 or 1.
Dcsnn	91. Roll an n-sided die and push the result.
Tms	92. Push the current Unix time.
Dts	93. Push the current date as YYYYMMDD.
Sdn	94. Seed the random number generator with n.
Pcspp	95. Push 1 with probability p%, otherwise 0.
Wks	96. Push the current weekday number (1–7).
Bitwise and conversion
Ans	97. Pop two, push bitwise AND.
Ors	98. Pop two, push bitwise OR.
Xrs	99. Pop two, push bitwise XOR.
Bns	100. Convert the top to a binary string.
Hxs	101. Convert the top to a hexadecimal string.
Mtsnamename	102. Map the named function over every element of s.

History

Sushi was created in 2026 by a user named Sushi as an unconventional language built around an infinite number of stacks.

Etymology

The language takes its name from its creator's username, which was itself chosen at random.

See also

• Sushi (dragoneater67)