Learn UNLAMBDA with Real Code Examples

Updated Nov 26, 2025

Introduction & Fundamentals Setup & Configuration Architecture & Deep Internals Performance & Security Development Workflow Learning & Career Growth Business & Strategy Examples

Code Sample Descriptions

Hello World in Unlambda

`s``s`ks``s`k`s`kk
``s``s`ks``s`k`s`k``s`ksk
`k``s`k`s`k`k``s`ks``s`k`s`kk
.k
.e
.l
.l
.o
. 
.w
.o
.r
.l
.d
.!

A canonical 'Hello World' program in Unlambda. It uses backtick (`) for function application and .x to print characters.

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Print Single Character

.A

Prints a single character 'A' using Unlambda.

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Simple Function Application

`i.B

Demonstrates applying the identity function `i` to print 'B'.

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Repeat Printing

`k.C
C
C

Uses the `k` combinator to ignore an argument and print 'C' multiple times.

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Conditional Example

`s`k.Y
`k.N

Uses `s` and `k` combinators to simulate a simple conditional printing 'Y' or 'N'.

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Lambda Composition

`s`.A.B

Composes two functions to print 'AB'.

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Nested Functions

`s``s`ks``s`k`s`kk
.X
.Y

Demonstrates nested combinator applications to print 'XY'.

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Looping Print

`d`.Z
.Z
.Z

Uses recursion with `d` to print 'Z' three times.

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Echo Input Character

Reads a character from input and prints it.

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Complex Hello

`s``s`ks``s`k`s`kk
.k
.e
.l
.l
.o
.

Another 'Hello' example using nested combinators and `.x` printing.

Let’s Try →

Learn UNLAMBDA with Real Code Examples

Updated Nov 26, 2025

Introduction & Fundamentals Setup & Configuration Architecture & Deep Internals Performance & Security Development Workflow Learning & Career Growth Business & Strategy Examples

Code Sample Descriptions

Hello World in Unlambda

`s``s`ks``s`k`s`kk
``s``s`ks``s`k`s`k``s`ksk
`k``s`k`s`k`k``s`ks``s`k`s`kk
.k
.e
.l
.l
.o
. 
.w
.o
.r
.l
.d
.!

A canonical 'Hello World' program in Unlambda. It uses backtick (`) for function application and .x to print characters.

Let’s Try →

Print Single Character

.A

Prints a single character 'A' using Unlambda.

Let’s Try →

Simple Function Application

`i.B

Demonstrates applying the identity function `i` to print 'B'.

Let’s Try →

Repeat Printing

`k.C
C
C

Uses the `k` combinator to ignore an argument and print 'C' multiple times.

Let’s Try →

Conditional Example

`s`k.Y
`k.N

Uses `s` and `k` combinators to simulate a simple conditional printing 'Y' or 'N'.

Let’s Try →

Lambda Composition

`s`.A.B

Composes two functions to print 'AB'.

Let’s Try →

Nested Functions

`s``s`ks``s`k`s`kk
.X
.Y

Demonstrates nested combinator applications to print 'XY'.

Let’s Try →

Looping Print

`d`.Z
.Z
.Z

Uses recursion with `d` to print 'Z' three times.

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Echo Input Character

Reads a character from input and prints it.

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Complex Hello

`s``s`ks``s`k`s`kk
.k
.e
.l
.l
.o
.

Another 'Hello' example using nested combinators and `.x` printing.

Let’s Try →