Happy Language

Documentation

Types

Happy supports Number, String, and List types. Booleans are represented as 1 (true) or 0 (false). '=>' in these docs represent the output. They are NOT apart of the code

Built-in Constants

null  => 0
true  => 1
false => 0
pi    => 3.14159...
happy => ":)"

Variables

var x = 10
var name = "Happy"
var list = [1, 2, 3]
var isEqual = (5 == 5)
var test = if 3 >= 1 then "math works" else "math broken"

Multiple Statements

Happy allows multiple statements on a single line using semicolons (;).

var a = 1; var b = 2; var c = 3

print(a + b + c)

Conditionals

var x = 1
if x == 10 then print("x is 10") elif x > 10 then print("x is greater") else print("x is less")

Loops

For Loop

for i = 0 to 6 then print(i)

for i = 0 to 11 step 2 then print(i)

While Loop

var x = 0
while x < 5 then var x = x + 1

Functions

Built-in: print(), length(), fac()

Custom Functions

func add(x, y) -> x + y

var result = add(3, 4)

Lists

[1, 2, 3] + 4 => [1, 2, 3, 4]

[1, 2] + [3, 4, 5] => [1, 2, 3, 4, 5]

[1, 2, 3] ! 0 => 1

Strings

"Hello World"
"Text with \"quotes\""
"Text \n with newlines"

"Happy" * 3 => "HappyHappyHappy"

Operators

Arithmetic: + - * /

Comparison: == != < > <= >=

Logical: not

Examples

func area_circle(r) -> pi*r*r
func circumference_circle(r) -> 2*pi*r

func area_triangle(b, h) -> (b*h)/2

area_circle(1)
circumference_circle(1)

area_triangle(2,2)

print("Counting from 1 to 10:")
for i = 1 to 11 then print(i)

print("Counting to 20 by twos:")
for i = 0 to 21 step 2 then print(i)

func celsiusToFahrenheit(c) -> (c * 9 / 5) + 32

var temp_c = 0
var temp_f = celsiusToFahrenheit(temp_c)

var a = [1,2,3]
var b = [1,2] + 3
var c = [1] + [2,3]
var d = [1,2] + [3]

print("Happy" * 3)

var greeting = "Hello " + "World!"

print(happy + "\n")

for i = 1 to 100 then print(("*" * i) + "\n")

func letter_grade(percent) -> if percent >= 90 then "A" elif percent >= 80 then "B" elif percent >= 70 then "C" else "Try harder!"

letter_grade(97)
letter_grade(83)
letter_grade(79)
letter_grade(53)