Learn COFFEESCRIPT with Real Code Examples

count = 0
isDark = false

updateUI = ->
    console.log "Counter: #{count}"
    console.log "Theme: #{if isDark then 'Dark' else 'Light'}"

increment = ->
    count += 1
    updateUI()

decrement = ->
    count -= 1
    updateUI()

reset = ->
    count = 0
    updateUI()

toggleTheme = ->
    isDark = !isDark
    updateUI()

# Simulate actions
updateUI()
increment()
increment()
toggleTheme()
decrement()
reset()

Demonstrates a simple counter with theme toggling using CoffeeScript variables and console output.

a = 10
b = 20
sum = a + b
console.log "Sum: #{sum}"

Adds two numbers and prints the result.

factorial = (n) -> if n <= 1 then 1 else n * factorial(n - 1)
console.log "Factorial 5: #{factorial 5}"

Calculates factorial recursively.

fib = (n) -> if n < 2 then n else fib(n-1) + fib(n-2)
for i in [0..9]
    console.log fib(i)

Generates first 10 Fibonacci numbers.

a = 10
b = 20
max = if a > b then a else b
console.log "Max: #{max}"

Finds the maximum of two numbers.

arr = [1,2,3,4,5]
sum = 0
for x in arr
    sum += x
console.log "Sum: #{sum}"

Sums elements of an array.

arr = [1,2,3,4,5]
for x in arr
    console.log x if x % 2 is 0

Prints even numbers from an array.

count = 3
count += 1 if count < 5
console.log "Count: #{count}"

Increment counter only if less than 5.

count = 0
count += 1
count += 1
console.log "Count: #{count}"
count = 0
console.log "Count: #{count}"

Counter that increments and can be reset.

isDark = false
console.log "Theme: #{if isDark then 'Dark' else 'Light'}"
isDark = !isDark
console.log "Theme: #{if isDark then 'Dark' else 'Light'}"
isDark = !isDark
console.log "Theme: #{if isDark then 'Dark' else 'Light'}"

Toggles theme multiple times.