title: Start
---
// Variable testing

// Testing variable storage
<<set $foo to 1>>

// Test numeric storage
<<call assert($foo == 1)>>

<<set $foo to -1>>

// Test numeric storage (negative)
<<call assert($foo == -1)>>

// Test string storage
<<set $foo to "foo">>
<<call assert($foo == "foo")>>

<<set $foo to null>>

// Test null storage
<<call assert($foo == null)>>

// Test immediate value arithmetic
<<set $foo = 45>>

<<set $bar = $foo + 1>>

// Test immediate addition
<<call assert($bar == 46)>>

<<set $bar = $foo - 1>>

// Test immediate subtraction
<<call assert($bar == 44)>>

<<set $foo = 46>>
<<set $bar = $foo * 2>>

// Test immediate multiplication
<<call assert($bar == 92)>>

<<set $bar = $foo / 2>>

// Test immediate division
<<call assert($bar == 23)>>

<<set $foo = 45>>
<<set $foo += 1>>

// Test immediate assignment addition
<<call assert($foo == 46)>>

<<set $foo *= 2>>

// Test immediate assignment multiplication
<<call assert($foo == 92)>>

<<set $foo /= 2>>

// Test immediate assignment division
<<call assert($foo == 46)>>

<<set $foo -= 1>>

// Test immediate assignment subtraction
<<call assert($foo == 45)>>

// Testing variable arithmetic
<<set $foo = 46>>
<<set $bar = 1>>
<<set $foobar = $foo + $bar>>

// Test variable addition
<<call assert($foobar == 47)>>

<<set $foobar = $foo - $bar>>

// Test variable subtraction
<<call assert($foobar == 45)>>

<<set $bar = 2>>
<<set $foobar = $foo * $bar>>

// Test variable multiplication
<<call assert($foobar == 92)>>

<<set $foobar = $foo / $bar>>

// Test variable division
<<call assert($foobar == 23)>>

// Testing default variable values
<<set $foounused += 1>>

// An undefined variable must default to 0 for arithmetic
<<call assert($foounused == 1)>>

// Testing string addition
<<set $foo = "foo">>
<<set $bar = "bar">>
<<set $foobar = $foo + "bar">>

// "Test immediate string addition
<<call assert($foobar == "foobar")>>

<<set $foobar = $foo + $bar>>

// "Test string addition
<<call assert($foobar == "foobar")>>

===