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文本函数
本节介绍「文本」函数。
Using double quotation marks in formulas
To include a text string in a formula, place the text string between two double quotation marks (") and Calc takes the characters in the string without attempting to interpret them. For example, the formula ="Hello world!" displays the text string Hello world! in the cell, with no surrounding double quotation marks.
The more complex formula =CONCATENATE("Life is really simple, "; "but we insist on making it complicated "; "(Confucius).") concatenates three individual strings in double quotation marks, outputting Life is really simple, but we insist on making it complicated (Confucius).
To place a literal double quotation mark within a string inside a formula, two methods can be used:
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You can "escape" the double quotation mark with an additional double quotation mark, and Calc treats the escaped double quotation mark as a literal value. For example, the formula ="My name is ""John Doe""." outputs the string My name is "John Doe". Another simple example is the formula =UNICODE("""") which returns 34, the decimal value of the Unicode quotation mark character (U+0022) — here the first and fourth double quotation marks indicate the beginning and end of the string, while the second double quotation mark escapes the third.
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You can use the CHAR function or the UNICHAR function to insert a double quotation mark. For example, the formula =UNICHAR(34) & "The Catcher in the Rye" & UNICHAR(34) & " is a famous book by J. D. Salinger." displays the string "The Catcher in the Rye" is a famous book by J. D. Salinger.
Be aware that Calc's AutoCorrect function may modify double quotation marks. AutoCorrect should not change the double quotation marks within formula cells but may change those used in non-formula cells containing text. For example, if you copy a string that is surrounded by some other form of typographical double quotation marks, such as the left double quotation mark (U+201C) and the right double quotation mark (U+201D), and then paste into a formula cell, an error may result. Open the Double Quotes area of the dialog to set the characters used to automatically correct the start and end typographical double quotation marks. Uncheck the toggle button to disable the feature.
Empty string and blank cells
Cells with the empty string ("") are not equivalent to blank cells. When searching or calculating with text, the empty string "" is the text with length zero.
For example, when the formula in A1 returns the empty string "", the following applies:
=ISBLANK(A1) returns FALSE. The cell is not blank.
=ISFORMULA(A1) returns TRUE. The cell is a formula.
=ISLOGICAL(A1) returns FALSE. Not a logical value.
=ISNONTEXT(A1) returns FALSE. The cell has the empty string.
=ISNUMBER(A1) returns FALSE. Not a number.
=ISTEXT(A1) returns TRUE. The cell has the empty string, calculated by a formula.
=LEN(A1) returns 0. The length of the empty string is 0.
Returns the numeric value corresponding to a Roman number expressed as text.
Converts double-byte (full-width) characters to single-byte (half-width) ASCII and katakana characters.
Converts a number to Thai text, including the Thai currency names.
Converts a positive integer to a specified base into a text from the numbering system. The digits 0-9 and the letters A-Z are used.
Converts a number into a character according to the current code table. The number can be a two-digit or three-digit integer number.
All non-printing characters are removed from the string.
Returns a numeric code for the first character in a text string.
Combines several text strings into one string.
Converts text that represents a number in a numeral system with the given base radix to a positive integer. The radix must be in the range 2 to 36. Spaces and tabs are ignored. The Text field is not case-sensitive.
Converts a number to a string representing the amount in the currency format, rounded to a specified decimal places, using the decimal separator that corresponds to the current locale setting. In the Value field enter the number to be converted. Optionally, you may enter the number of decimal places in the Decimals field. If no value is specified, all numbers in currency format will be displayed with two decimal places.
Compares two text strings and returns TRUE if they are identical. This function is case-sensitive.
Returns the position of a string of text within another string.You can also define where to begin the search. The search term can be a number or any string of characters. The search is case-sensitive.
Returns a number as text with a specified number of decimal places and optional thousands separators.
Converts single-byte (half-width) ASCII or katakana characters to double-byte (full-width) characters.
Returns the first character or characters of a text.
Returns the first characters of a DBCS text.
Returns the length of a string including spaces.
For double-byte character set (DBCS) languages, returns the number of bytes used to represent the characters in a text string.
Converts all uppercase letters in a text string to lowercase.
Returns a text string of a text. The parameters specify the starting position and the number of characters.
Returns a text string of a DBCS text. The parameters specify the starting position and the number of characters.
Capitalizes the first letter in all words of a text string.
Replaces part of a text string with a different text string. This function can be used to replace both characters and numbers (which are automatically converted to text). The result of the function is always displayed as text. If you intend to perform further calculations with a number which has been replaced by text, you will need to convert it back to a number using the VALUE function.
Repeats a character string by the given number of copies.
Returns the last character or characters of a text.
Returns the last character or characters of a text with double bytes characters sets (DBCS).
Converts a number into a Roman numeral. The value range must be between 0 and 3999. A simplification mode can be specified in the range from 0 to 4.
Returns the position of a text segment within a character string. You can set the start of the search as an option. The search text can be a number or any sequence of characters. The search is not case-sensitive. If the text is not found, returns error 519 (#VALUE).
Substitutes new text for old text in a string.
This function returns the target text, or a blank text string if the target is not text.
Converts a value into text according to a given format.
Removes spaces from a string, leaving only a single space character between words.
Converts a code number into a Unicode character or letter.
Returns the numeric code for the first Unicode character in a text string.
Converts the string specified in the text field to uppercase.
Converts the string representation of a number to numeric form. If the supplied string is a valid date, time, or date-time, the corresponding date-time serial number is returned.