| VBA Function | 역할 |
|---|
| Abs | 숫자의 절대값을 반환한다. |
| Array | 배열을 담고 있는 variant를 반환한다. |
| Asc | 문자열의 첫 글자의 ASCII 값을 반환한다. |
| Atn | 숫자의 아크탄젠트(arctangent) 값을 반환한다. |
| CBool | 부울(boolean) 형식으로 변환한다. |
| CByte | 바이트(byte) 형식으로 변환한다. |
| CCur | (currency)형식으로 변환한다. |
| CDate | Converts an expression to date data type |
| CDbl | Converts an expression to double data type |
| CDec | Converts an expression to decimal data type |
| Choose | Selects and returns a value from a list of arguments |
| Chr | Converts an ANSI value to a string |
| CInt | Converts an expression to integer data type |
| CLng | Converts an expression to long data type |
| Cos | Returns the cosine of a number |
| CreateObject | Creates an OLE Automation object |
| CSng | Converts an expression to single data type |
| CStr | Converts an expression to string data type |
| CurDir | Returns the current path |
| CVar | Converts an expression to variant data type |
| CVDate | Converts an expression to date data type |
| CVErr | Returns a user-defined error number |
| Date | Returns the current system date |
| DateAdd | Returns a date with a specific date interval added to it |
| DateDiff | Returns a date with a specific date interval subtracted from it |
| DatePart | Returns an integer containing a specific part of a date |
| DateSerial | Converts a date to a serial number |
| DateValue | Converts a string to date |
| Day | Returns the day of the month of a date |
| Dir | Returns the name of a file or directory that matches a pattern |
| DoEvents | Yields execution so the operating system can process other events |
| EOF | Returns True if the end of a text file has been reached |
| Error | Returns the error message that corresponds to an error number |
| Exp | Returns the base of the natural logarithms (e) raised to a power |
| FileAttr | Returns the file mode for a text file |
| FileDateTime | Returns the date and time when a file was last modified |
| FileLen | Returns the number of bytes in a file |
| Fix | Returns the integer portion of a number |
| Format | Displays an expression in a particular format |
| Format Currency | Returns a number as a string, formatted as currency |
| FormatDateTime | Returns a number as a string, formatted as a date and/or time |
| Format Number | Returns a number as a formatted string |
| Format Percent | Returns a number as a string, formatted as a percentage |
| FreeFile | Returns the next file number available for use by the Open statement |
| GetAll | Returns a list of key settings and their values (originally created with SaveSetting) from an application’s entry in the Windows registry |
| GetAttr | Returns a code representing a file attribute |
| GetObject | Retrieves an OLE Automation object from a file |
| GetSetting | Returns a key setting value from an application’s entry in the Windows registry |
| Hex | Converts from decimal to hexadecimal |
| Hour | Returns the hour of a time |
| IIf | Returns one of two parts, depending on the evaluation of an expression |
| Input | Returns a specific number of characters from an open text file |
| InputBox | Displays a box to prompt a user for input |
| InStr | Returns the position of a string within another string |
| InStrRev | Returns the position of a string within another string, beginning at the back end of the string |
| Int | Returns the integer portion of a number |
| IsArray | Returns True if a variable is an array |
| IsDate | Returns True if a variable is a date |
| IsEmpty | Returns True if a variable has been initialized |
| IsError | Returns True if an expression is an error value |
| IsMissing | Returns True if an optional argument was not passed to a Procedure |
| IsNull | Returns True if an expression contains no valid data |
| IsNumeric | Returns True if an expression can be evaluated as a number |
| IsObject | Returns True if an expression references an OLE Automation object |
| Join | Returns a string created by joining a number of substrings contained in an array |
| LBound | Returns the lower bound of an array |
| LCase | Returns a string converted to lowercase |
| Left | Returns a specified number of characters from the left of a string |
| Len | Returns the length of a string, in characters |
| Loc | Returns the current read or write position of a text file |
| LOF | Returns the number of bytes in an open text file |
| Log | Returns the natural logarithm of a number |
| LTrim | Returns a copy of a string with no leading spaces |
| Mid | Returns a specified number of characters from a string |
| MidB | Returns a specified number of bytes from a string |
| Minute | Returns the minute of a time |
| Month | Returns the month of a date |
| MonthName | Returns a string indicating the specified month |
| MsgBox | Displays a modal message box |
| Now | Returns the current system date and time |
| Oct | Converts from decimal to octal |
| Replace | Returns a string in which one substring is replaced with another |
| RGB | Returns a number representing an RGB color value |
| Space | Returns a string with a specified number of spaces |
| Split | Returns an array consisting of a number of substrings |
| Sqr | Returns the square root of a number |
| Str | Returns a string representation of a number |
| Right | Returns a specified number of characters from the right of a string |
| Rnd | Returns a random number between 0 and 1 |
| Round | Rounds a number to a specific number of decimal places |
| RTrim | Returns a copy of a string with no trailing spaces |
| Second | Returns the second of a time |
| Seek | Returns the current position in a text file |
| Sgn | Returns an integer that indicates the sign of a number |
| Shell | Runs an executable program |
| Sin | Returns the sin of a number |
| StrComp | Returns a value indicating the result of a string comparison |
| StrConv | Returns a string variant converted as specified |
| String | Returns a repeating character or string |
| StrReverse | Reverses the character order of a string |
| Switch | Evaluates a list of expressions and returns a value associated with the first expression in the list that is True |
| Tab | Positions output in an output stream |
| Tan | Returns the tangent of a number |
| Time | Returns the current system time |
| Timer | Returns the number of seconds since midnight |
| TimeSerial | Returns the time for a specified hour, minute, and second |
| TimeValue | Converts a string to a time serial number |
| Trim | Returns a string containing a copy of a specified string without leading spaces and trailing spaces |
| TypeName | Returns a string that describes the data type of a variable |
| UBound | Returns the upper bound of an array |
| UCase | Converts a string to uppercase |
| Val | Returns the numbers contained in a string |
| VarType | Returns a value indicating the subtype of a variable |
| Weekday | Returns a number representing a day of the week |
| Weekday Name | Returns a string indicating the specified weekday |
| Year | Returns the year of a date |
을 반복법으로 풀어라.
형식으로 변형시킨다.
으로 변형시킨다. 따라서 
가 된다.