算术运算符 #

1 + 2
3 - 1
2 * 3
6 / 2
7 ÷ 2
2 \ 6
2 ^ 3
7 % 3

+x
-x
+x
-x

7 ÷ 2
10 ÷ 3
-7 ÷ 2

div(7, 2)
div(10, 3)
div(-7, 2)
fld(7, 2)
cld(7, 2)

7 % 3
rem(7, 3)
mod(7, 3)
rem(-7, 3)
mod(-7, 3)

2 ^ 3
2 ^ 10
2 ^ -1
4 ^ 0.5

sqrt(16)
sqrt(2)
cbrt(27)
cbrt(2)

exp(1)
exp(2)
log(ℯ)
log(2, 8)
log10(100)
log2(8)

abs(-5)
abs(5)
abs2(-5)
sign(-5)
sign(5)
sign(0)

round(3.7)
round(3.4)
floor(3.7)
ceil(3.7)
trunc(3.7)
trunc(-3.7)

round(3.14159, digits=2)
round(3.14159, digits=4)

sin(π/6)
cos(π/3)
tan(π/4)
asin(0.5)
acos(0.5)
atan(1)
sinh(1)
cosh(1)
tanh(1)

sind(30)
cosd(60)
tand(45)

sinh(1)
cosh(1)
tanh(1)
asinh(1)
acosh(2)
atanh(0.5)

+=    -=    *=    /=    ÷=    \=    ^=    %=

x = 10
x += 5
x -= 3
x *= 2
x /= 4
x ÷= 2
x ^= 2
x %= 10

2 + 3 * 4
(2 + 3) * 4
2 ^ 3 * 4
2 ^ (3 * 4)
-3 ^ 2
(-3) ^ 2

1 < 2 < 3
1 < 2 > 1
1 < 3 == 3

(1 + 2im) + (3 + 4im)
(1 + 2im) * (3 + 4im)
abs(3 + 4im)

1 // 2 + 1 // 3
1 // 2 * 2 // 3
1 // 2 / 1 // 4

function calculator(a, op, b)
    if op == "+"
        return a + b
    elseif op == "-"
        return a - b
    elseif op == "*"
        return a * b
    elseif op == "/"
        return b == 0 ? "Error: Division by zero" : a / b
    elseif op == "^"
        return a ^ b
    else
        return "Unknown operator"
    end
end

calculator(10, "+", 5)
calculator(10, "/", 2)

function quadratic(a, b, c)
    Δ = b^2 - 4*a*c
    if Δ < 0
        return nothing
    end
    x1 = (-b + sqrt(Δ)) / (2a)
    x2 = (-b - sqrt(Δ)) / (2a)
    return x1, x2
end

quadratic(1, -5, 6)

function factorial_iterative(n)
    result = 1
    for i in 1:n
        result *= i
    end
    return result
end

factorial_iterative(5)
factorial(5)