Learn Nim - 10 Code Examples & CST Typing Practice Test

Nim is a statically typed, compiled systems programming language with Python-like syntax. It emphasizes performance, expressiveness, and metaprogramming, making it suitable for system tools, web development, and scientific computing.

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Nim Counter and Theme Toggle Nim Simple Addition Nim Factorial Nim Fibonacci Sequence Nim Max of Two Numbers Nim List Sum Nim Even Numbers Filter Nim Conditional Counter Increment Nim Resettable Counter Nim Theme Toggle Only

Learn NIM with Real Code Examples

Updated Nov 20, 2025

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Code Sample Descriptions

Nim Counter and Theme Toggle

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.

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Nim Simple Addition

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

echo add(10, 20)

Adds two numbers and prints the result.

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Nim Factorial

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

echo factorial(5)

Calculates factorial recursively.

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Nim Fibonacci Sequence

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.

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Nim Max of Two Numbers

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

echo max(10, 20)

Finds the maximum of two numbers.

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Nim List Sum

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

Sums elements of a sequence.

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Nim Even Numbers Filter

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

Prints even numbers from an array.

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Nim Conditional Counter Increment

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

Increment counter only if less than 5.

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Nim Resettable Counter

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

Counter that increments and can be reset.

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Nim Theme Toggle Only

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.

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Frequently Asked Questions about Nim

What is Nim?

What are the primary use cases for Nim?

System utilities and command-line tools. Web backends and frameworks. Scientific and numerical computing. Game development and graphics engines. Metaprogramming and code generation

What are the strengths of Nim?

High-performance native binaries. Readable and concise syntax. Powerful metaprogramming capabilities. Cross-platform portability. Flexibility between paradigms (OOP, functional, imperative)

What are the limitations of Nim?

Smaller ecosystem and community compared to mainstream languages. Limited libraries for some specialized domains. Less industrial adoption than Rust or Go. Requires understanding of memory management for optimal performance. Interfacing with large C++ projects can be complex

How can I practice Nim typing speed?

CodeSpeedTest offers 10+ real Nim code examples for typing practice. You can measure your WPM, track accuracy, and improve your coding speed with guided exercises.

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Code Sample Descriptions

Nim Counter and Theme Toggle

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.

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Nim Simple Addition

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

echo add(10, 20)

Adds two numbers and prints the result.

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Nim Factorial

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

echo factorial(5)

Calculates factorial recursively.

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Nim Fibonacci Sequence

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.

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Nim Max of Two Numbers

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

echo max(10, 20)

Finds the maximum of two numbers.

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Nim List Sum

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

Sums elements of a sequence.

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Nim Even Numbers Filter

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

Prints even numbers from an array.

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Nim Conditional Counter Increment

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

Increment counter only if less than 5.

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Nim Resettable Counter

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

Counter that increments and can be reset.

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Nim Theme Toggle Only

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.

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Frequently Asked Questions about Nim

What is Nim?

What are the primary use cases for Nim?

System utilities and command-line tools. Web backends and frameworks. Scientific and numerical computing. Game development and graphics engines. Metaprogramming and code generation

What are the strengths of Nim?

High-performance native binaries. Readable and concise syntax. Powerful metaprogramming capabilities. Cross-platform portability. Flexibility between paradigms (OOP, functional, imperative)

What are the limitations of Nim?

How can I practice Nim typing speed?

CodeSpeedTest offers 10+ real Nim code examples for typing practice. You can measure your WPM, track accuracy, and improve your coding speed with guided exercises.