Round làm tròn. Round ( expression [, decimalplaces] ) Parameters expression giá trị decimalplaces số số lấy sau dấu phẩy Return Value số đã đc làm tròn Remarks The decimalplaces parameter can be negative which allows you to round to the ones, tens, hundred, etc. place. Note that up to fifteen digits of a number are displayed, and note that decimalplaces will never pad a number with trailing zeros. Related Int, Number Example $x = Round(-1.582, 1) ;returns -1.6 $y = Round(3.1415, 9) ;no change $z = Round(123.5, -1) ;returns 120 Function Reference Sin Calculates the sine of a number. Sin ( expression ) Parameters expression Value in radians. Return Value Returns the trigonometric sine of number. Remarks 1° = pi / 180 radians. Related Cos, Tan, ASin, ACos, ATan Example $pi = 3.14159265358979 $x = sin($pi / 4) ;returns 0.707106781186547 which you should recognize as sqrt(2)/2 $degToRad = $pi / 180 $y = Sin(90 * $degToRad) ;sine of 90° Function Reference Sqrt Calculates the square-root of a number. Sqrt ( expression ) Parameters expression Any nonnegative expression to get the square-root of. Return Value Success: Returns the square-root. Failure: Returns 0 and sets @error to 1 if parameter is negative. Remarks To compute an nth root, use the power operator: x ^ (1/n) MsgBox(0,"The cube root of 27 is", 27 ^ (1/3) ) Related Exp, Log Example $x = Sqrt(2) ;returns 1.4142135623731 $y = sqrt(9) ;returns 3 Function Reference SRandom Set Seed for random number generation. SRandom ( Seed ) Parameters Seed Seed value for random number generation. Number between -2^31 and 2^31-1 Return Value None. Remarks None. Related Random Example SRandom(12) $rand=Random() Function Reference Tan Calculates the tangent of a number. Tan ( expression ) Parameters expression Value in radians. Return Value Returns the trigonometric tangent of number. Remarks 1° = pi / 180 radians. Note that Tan is "infinite" for -3PI/2, -PI/2, PI/2, 3PI/2, 5PI/2, and tends to return 1.63317787283838e+016 for such multiples of Pi-halves. Related Sin, Cos, ASin, ACos, ATan Example $pi = 3.14159265358979 $x = tan($pi / 4) $degToRad = $pi / 180 $y = Tan(90 * $degToRad) ;tangent of 90° Function Reference InputBox Displays an input box to ask the user to enter a string. InputBox ( "title", "Prompt" [, "Default" [, "password char" [, width, height [, left, top [, timeOut [, hwnd]]]]]] ) Parameters title The title of the input box. prompt A message to the user indicating what kind of input is expected. default The value that the input box starts with. password char [optional] The character to replace all typed characters with. If you want the actual typed character to appear, define with an empty string ("") (default) or a space for the first character. If you provide a multiple-char string, only the first char is used for character masking. There are special meanings for the second and subsequent characters. See Remarks. width [optional] The width of the window. If defined, height must also be defined. Use -1 or the keyword Default for default width. height [optional] The height of the window. If defined, width must also be defined. Use -1 or the keyword Default for default height. left [optional] The left side of the input box. By default, the box is centered. If defined, top must also be defined. Use the keyword Default for this parameter to center the InputBox horizontally. top [optional] The top of the input box. By default, the box is centered. If defined, left must also be defined. Use the keyword Default for this parameter to center the InputBox vertically. timeout [optional] How many seconds to wait before automatically cancelling the InputBox. hwnd [optional] The window handle to use as the parent for this dialog. Return Value Success: Returns the string that was entered. Failure: Returns "" (blank string) and sets @error as follows: @Error 0 = The string returned is valid. 1 = The Cancel button was pushed.