Learn LOLCODE with Real Code Examples

Updated Nov 26, 2025

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Code Sample Descriptions

Hello World in LOLCODE

HAI 1.2
CAN HAS STDIO?
VISIBLE "HAI WORLD!"
KTHXBYE

The canonical LOLCODE 'Hello World!' program.

Let’s Try →

Simple Addition

HAI 1.2
I HAS A NUM1 ITZ 5
I HAS A NUM2 ITZ 10
I HAS A SUM
SUM R SUM OF NUM1 AN NUM2
VISIBLE SUM
KTHXBYE

Adds two numbers and prints the result.

Let’s Try →

Simple Subtraction

HAI 1.2
I HAS A NUM1 ITZ 10
I HAS A NUM2 ITZ 4
I HAS A DIFF
DIFF R NUM1 MINUS NUM2
VISIBLE DIFF
KTHXBYE

Subtracts one number from another and prints the result.

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Check Even Number

HAI 1.2
I HAS A NUM ITZ 6
BOTH SAEM NUM MOD 2 AN 0, O RLY?
    YA RLY
        VISIBLE "YES"
    NO WAI
        VISIBLE "NO"
OIC
KTHXBYE

Checks if a number is even and prints YES or NO.

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Check Odd Number

HAI 1.2
I HAS A NUM ITZ 7
BOTH SAEM NUM MOD 2 AN 1, O RLY?
    YA RLY
        VISIBLE "YES"
    NO WAI
        VISIBLE "NO"
OIC
KTHXBYE

Checks if a number is odd and prints YES or NO.

Let’s Try →

Simple Multiplication

HAI 1.2
I HAS A NUM1 ITZ 3
I HAS A NUM2 ITZ 4
I HAS A PROD
PROD R NUM1 TIMES NUM2
VISIBLE PROD
KTHXBYE

Multiplies two numbers and prints the result.

Let’s Try →

Simple Division

HAI 1.2
I HAS A NUM1 ITZ 20
I HAS A NUM2 ITZ 5
I HAS A QUOT
QUOT R NUM1 DIVIDEDBY NUM2
VISIBLE QUOT
KTHXBYE

Divides one number by another and prints the result.

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Factorial Function

HAI 1.2
I HAS A NUM ITZ 5
HOW IZ FACT YR NUM
    NUM SMALLR 1, O RLY?
        YA RLY
        VISIBLE 1
        NO WAI
        VISIBLE NUM TIMES FACT NUM BIGGR 1
    OIC
VISIBLE FACT NUM
KTHXBYE

Computes factorial of a number using recursion.

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Fibonacci Sequence

HAI 1.2
I HAS A A ITZ 0
I HAS A B ITZ 1
I HAS A TEMP
VISIBLE A
VISIBLE B
IM IN YR LOOP N TIMES 8
    TEMP R A PLUS B
    VISIBLE TEMP
    A R B
    B R TEMP
IM OUTTA YR LOOP
KTHXBYE

Prints the first few Fibonacci numbers using LOLCODE.

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Maximum of Two Numbers

HAI 1.2
I HAS A NUM1 ITZ 10
I HAS A NUM2 ITZ 15
BOTH SAEM NUM1 BIGGR THAN NUM2, O RLY?
    YA RLY
        VISIBLE NUM1
    NO WAI
        VISIBLE NUM2
OIC
KTHXBYE

Finds and prints the maximum of two numbers.

Let’s Try →

Code Sample Descriptions

Hello World in LOLCODE

HAI 1.2
CAN HAS STDIO?
VISIBLE "HAI WORLD!"
KTHXBYE

The canonical LOLCODE 'Hello World!' program.

Let’s Try →

Simple Addition

HAI 1.2
I HAS A NUM1 ITZ 5
I HAS A NUM2 ITZ 10
I HAS A SUM
SUM R SUM OF NUM1 AN NUM2
VISIBLE SUM
KTHXBYE

Adds two numbers and prints the result.

Let’s Try →

Simple Subtraction

HAI 1.2
I HAS A NUM1 ITZ 10
I HAS A NUM2 ITZ 4
I HAS A DIFF
DIFF R NUM1 MINUS NUM2
VISIBLE DIFF
KTHXBYE

Subtracts one number from another and prints the result.

Let’s Try →

Check Even Number

HAI 1.2
I HAS A NUM ITZ 6
BOTH SAEM NUM MOD 2 AN 0, O RLY?
    YA RLY
        VISIBLE "YES"
    NO WAI
        VISIBLE "NO"
OIC
KTHXBYE

Checks if a number is even and prints YES or NO.

Let’s Try →

Check Odd Number

HAI 1.2
I HAS A NUM ITZ 7
BOTH SAEM NUM MOD 2 AN 1, O RLY?
    YA RLY
        VISIBLE "YES"
    NO WAI
        VISIBLE "NO"
OIC
KTHXBYE

Checks if a number is odd and prints YES or NO.

Let’s Try →

Simple Multiplication

HAI 1.2
I HAS A NUM1 ITZ 3
I HAS A NUM2 ITZ 4
I HAS A PROD
PROD R NUM1 TIMES NUM2
VISIBLE PROD
KTHXBYE

Multiplies two numbers and prints the result.

Let’s Try →

Simple Division

HAI 1.2
I HAS A NUM1 ITZ 20
I HAS A NUM2 ITZ 5
I HAS A QUOT
QUOT R NUM1 DIVIDEDBY NUM2
VISIBLE QUOT
KTHXBYE

Divides one number by another and prints the result.

Let’s Try →

Factorial Function

HAI 1.2
I HAS A NUM ITZ 5
HOW IZ FACT YR NUM
    NUM SMALLR 1, O RLY?
        YA RLY
        VISIBLE 1
        NO WAI
        VISIBLE NUM TIMES FACT NUM BIGGR 1
    OIC
VISIBLE FACT NUM
KTHXBYE

Computes factorial of a number using recursion.

Let’s Try →

Fibonacci Sequence

HAI 1.2
I HAS A A ITZ 0
I HAS A B ITZ 1
I HAS A TEMP
VISIBLE A
VISIBLE B
IM IN YR LOOP N TIMES 8
    TEMP R A PLUS B
    VISIBLE TEMP
    A R B
    B R TEMP
IM OUTTA YR LOOP
KTHXBYE

Prints the first few Fibonacci numbers using LOLCODE.

Let’s Try →

Maximum of Two Numbers

HAI 1.2
I HAS A NUM1 ITZ 10
I HAS A NUM2 ITZ 15
BOTH SAEM NUM1 BIGGR THAN NUM2, O RLY?
    YA RLY
        VISIBLE NUM1
    NO WAI
        VISIBLE NUM2
OIC
KTHXBYE

Finds and prints the maximum of two numbers.

Let’s Try →