Learn JULIA with Real Code Examples

count = 0
isDark = false

function updateUI()
    println("Counter: $count")
    println("Theme: $(isDark ? \"Dark\" : \"Light\")")
end

function increment()
    global count += 1
    updateUI()
end

function decrement()
    global count -= 1
    updateUI()
end

function reset()
    global count = 0
    updateUI()
end

function toggleTheme()
    global isDark = !isDark
    updateUI()
end

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

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

add(a,b) = a + b
subtract(a,b) = a - b
multiply(a,b) = a * b
divide(a,b) = a / b

println("Add 5 + 3: $(add(5,3))")
println("Subtract 5 - 3: $(subtract(5,3))")
println("Multiply 5 * 3: $(multiply(5,3))")
println("Divide 6 / 2: $(divide(6,2))")

Demonstrates basic arithmetic operations using functions.

function factorial(n)
    if n <= 1
        return 1
    else
        return n * factorial(n - 1)
    end
end

println("Factorial of 5: $(factorial(5))")

Recursive factorial function in Julia.

function fibonacci(n)
    if n == 0
        return 0
    elseif n == 1
        return 1
    else
        return fibonacci(n-1) + fibonacci(n-2)
    end
end

for i in 0:9
    println(fibonacci(i))
end

Recursive Fibonacci sequence generator.

numbers = 1:10
squares = [x^2 for x in numbers if x % 2 == 0]
println(squares)

Using array comprehension to square even numbers.

scores = Dict("Alice"=>10, "Bob"=>5, "Charlie"=>12)
high_scores = Dict(k=>v for (k,v) in scores if v >= 10)
println(high_scores)

Filtering a dictionary based on values.

add = (x,y) -> x + y
println(add(3,7))

Using anonymous functions and broadcasting.

numbers = [1,2,3,4,5]
sum = reduce(+, numbers)
println(sum)

Summing a list of numbers using reduce.

xs = [1,2,3]
ys = [4,5,6]
sums = map(+, xs, ys)
println(sums)

Combining two arrays using zip and map.

(x,y) = (3,7)
sum = x + y
println(sum)

Destructuring a tuple and summing the elements.