Learn NIM with Real Code Examples

var count = 0
var isDark = false

proc updateUI() =
    echo "Counter: ", count
    echo "Theme: ", if isDark: "Dark" else: "Light"

proc increment() =
    count += 1
    updateUI()

proc decrement() =
    count -= 1
    updateUI()

proc reset() =
    count = 0
    updateUI()

proc toggleTheme() =
    isDark = not isDark
    updateUI()

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

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

proc add(a, b: int): int = a + b

echo add(10, 20)

Adds two numbers and prints the result.

proc factorial(n: int): int =
    if n <= 1: return 1
    n * factorial(n - 1)

echo factorial(5)

Calculates factorial recursively.

proc fib(n: int): int =
    if n < 2: return n
    fib(n - 1) + fib(n - 2)

for i in 0..9:
    echo fib(i)

Generates first 10 Fibonacci numbers.

proc max(a, b: int): int = if a > b: a else: b

echo max(10, 20)

Finds the maximum of two numbers.

let arr = @[1,2,3,4,5]
echo arr.fold(0, proc(x, y: int): int = x + y)

Sums elements of a sequence.

let arr = @[1,2,3,4,5]
for x in arr:
    if x mod 2 == 0: echo x

Prints even numbers from an array.

var count = 3
if count < 5: count += 1
echo count

Increment counter only if less than 5.

var count = 0
count += 1
count += 1
echo count
count = 0
echo count

Counter that increments and can be reset.

var isDark = false
echo if isDark: "Dark" else: "Light"
isDark = not isDark
echo if isDark: "Dark" else: "Light"
isDark = not isDark
echo if isDark: "Dark" else: "Light"

Toggles theme multiple times.