the language

SumoLang

Designed and built by Sumedh Pimplikar.

SumoLang is a competitive-programming language that refuses to take itself seriously. You don't declare variables, you sumo them. You don't return, you yeet. You don't break, you tapout. The semantics are dead serious; the keywords are not.

Fast I/O by default

slurp pulls whitespace-delimited tokens from a buffered stream. No scanners, no sync toggles, no boilerplate.

Silly, not sloppy

Every joke keyword desugars to a real one, so sumo x = 1 and let x = 1 compile to exactly the same program.

Zero setup

No imports, no main function, no header files. The first line of the file is the first line that runs.

The silly keyword table

Every alias on the left is interchangeable with the classic keyword on the right - mix and match freely.

sumoletDeclare a variable

stack / rosterarrDeclare an array

move / techniquefnDefine a function

yeetretReturn a value

shout / yellsayPrint values

slurp / gimmereadRead fast input

stomploopLoop

withininLoop binder

maybeifConditional

otherwiseelseElse branch

tapoutbreakExit the innermost loop

yep / nopetrue / falseBooleans

Syntax reference

sumo x = 10Declare a variable

stack xs = [1, 2, 3]Declare an array

xs[0] = 9Index assignment

slurp nFast whitespace-delimited input

shout "sum" totalPrint space-separated values + newline

move name(a, b) { yeet a + b }Function with return

maybe cond { … } otherwise { … }Conditional

stomp i within 0..n { … }Range loop (end exclusive)

stomp v within xs { … }Iterate an array

tapoutExit the innermost loop

len(xs) max(a,b) min(a,b) abs(x) int(x)Built-ins

Example programs

Sum of N integers

slurp n
sumo total = 0
stomp i within 0..n {
  slurp x
  total = total + x
}
shout total

Fibonacci (recursive)

move fib(n) {
  maybe n < 2 { yeet n }
  yeet fib(n - 1) + fib(n - 2)
}

stomp i within 0..10 {
  shout i fib(i)
}

Max in an array

stack xs = [4, 17, 3, 9]
sumo best = xs[0]
stomp v within xs {
  maybe v > best { best = v }
}
shout "the champion is" best

Running SumoLang

SumoLang runs through a dedicated interpreter service behind the SUMOLANG_SERVICE_URL endpoint. Until that service is wired up, CodeBlock falls back to the built-in reference interpreter, so every example on this page runs today.

Try SumoLang in the editor