The Excel Concatenate function joins together a series of supplied text strings or other values, into one combined text string.
The syntax of the function is:
where the text arguments are a set of one or more text strings or other values that you want to join together.
Note that:
Using the & Operator to Concatenate
Note that you can also use the & operator to concatenate in Excel.
This is described in the Excel String Concatenation page.The Concatenate function is used in column C of the following example spreadsheet, to join together the text strings in columns A and B.
Formulas:
 
Results:

Note that, in the examples above, a space (encased in quotes) has been added to separate the forename and surname.
The Concatenate function is used in cell D2 of the following example spreadsheet, to join together the text strings in cells A2 & B2 and the date in cell C2.
Formulas:
 
Results:

In order to concatenate the contents of cells A2, B2 and C2 of the above spreadsheet, with the date formatted correctly, we should use the Concatenate function as follows:
This formula returns the text string "Paul JONES, DOB: 02/02/87".
Note that, in the example above:
For further information and examples of the Excel Concatenate function, see the Microsoft Office website.
One of the most common Concatenate problems encountered by Excel users is that the function result shows a date or time as a number, as shown below:
Formulas:
 
Results:

Dates and times in Excel are represented internally by numbers. It is simply the formatting of a cell that causes these numbers to be displayed as dates and times. Therefore, when an Excel date or time is supplied to the Concatenate function, the result displays the underlying numeric value.
This problem can be solved by using the Excel Text function to convert the date or time value into a text string. This is shown in the example spreadsheet below:
Formulas:
 
Results:

The date and time formatting types are explained further in the Excel Custom Number Format page.