add = fun(a, b)
  return a + b
end

add = |a, b|
  return a + b
end

# Return the nth Fibonacci number that corresponds to 'count'
fibonacci = fun(count)
    first = 1
    second = 0
    i = 0
    while i < count do
        tmp = second
        second = first
        first = tmp + first
        i = i + 1
    end
    return second
end

# Return 'num' raised to the 'power'
pow = fun(num, power)
    acc = 1
    i = 0
    while i < power do
        acc = acc * num
        i = i + 1
    end
    return acc
end

print(pow(25, 2)) # 625
print(pow(2, 10)) # 1024

i = 0
while i < 10 do
    print(fibonacci(i))
    i = i + 1
end

Neither really but if I was forced to choose, then B. Though why not use Python or another language and have bindings/a library?