The three conditions of the id function are: the text to be extracted, the location where to start extraction, and the number of characters to be extracted.
The MID function is a function in Excel that is used to extract a piece of character starting from a specific position in a string. Here's how to fill in the form:
text: This is the first parameter, usually a cell reference or a string entered directly, representing the original text from which the character is to be extracted.
start num: This is the second parameter, which is a number that indicates where in the original text the character is extracted. Note that the position here is counted from 1, i.e. the first character of the text is at position 1.
num chars: This is the third parameter, and it is also a number that indicates how many characters to extract from the specified position.
For example, if you enter "Yalong Bay, Sanya, Hainan Province" in cell A1, and then use the formula =mid(a1, 4, 3) in cell A2, this will extract 3 characters starting from the 4th character in the text of cell A1, and the result will show "Sanya".
There are some important considerations when using the MID function to ensure that the required information can be extracted correctly:
First of all, the parameters of the mid function need to be filled in correctly. The first parameter is a text string, which can be a directly entered string or a cell reference. The second parameter is the position where the extraction begins, where the position is counted from 1, not 0. The third parameter is the number of characters to be extracted, which determines how long the text will be extracted from the specified position.
Second, when using the mid function, pay special attention to the starting position of the character count. For example, if the character to be extracted is next to the beginning of the text, then the starting position should be 1. If the character to be extracted is in the middle of the text, then the start position should be the position of that character in the text.
Furthermore, when using the mid function to extract specific information, it may need to be used in conjunction with other functions. For example, if you want to extract the last name in a name, and the name consists of a first and last name, and there is a space separating the two, then you can use the find function to find the position of the space first, and then add 1 as the starting position of the mid function, and the len function can help determine the number of characters to be extracted.
Finally, extracting domain names from email addresses is also a common use case. By determining the position of the "@" symbol, you can calculate the demarcation point between the username and the domain name in the email address, so as to accurately extract the domain name part.
In general, when using the MID function, make sure that the parameters are filled in correctly, pay attention to the starting position of the character count, and use it in combination with other functions as needed, so that the text data can be processed more flexibly and accurately.