// builtin

@something: "hello world";
@color: #112233;
@color2: rgba(44,55,66, .6);

body {
	color: @something;

	@num: 7 / 6;
	height: @num + 4;
	height: floor(@num) + 4px;
	height: ceil(@num) + 4px;

	@num2: 2 / 3;
	width: @num2;
	width: round(@num2);
	width: floor(@num2);
	width: ceil(@num2);
	width: round(10px / 3);

	color: rgbahex(@color);
	color: rgbahex(@color2);
	color: argb(@color2);
}


format {
  @r: 32;
  format: %("rgb(%d, %d, %d)", @r, 128, 64);
  format-string: %("hello %s", "world");
  format-multiple: %("hello %s %d", "earth", 2);
  format-url-encode: %('red is %A', #ff0000);
  eformat: e(%("rgb(%d, %d, %d)", @r, 128, 64));
}


#functions {
	str: isstring("hello");
	str: isstring(one, two);

	num: isnumber(2323px);
	num: isnumber(2323);
	num: isnumber(4/5);
	num: isnumber("hello");

	col: iscolor(red);
	col: iscolor(hello);
	col: iscolor(rgba(0,0,0,0.3));
	col: iscolor(#fff);

	key: iskeyword(hello);
	key: iskeyword(3D);

	px: ispixel(10px);
	px: ispixel(10);

	per: ispercentage(10%);
	per: ispercentage(10);

	em: isem(10em);
	em: isem(10);
}