# Reverse text string

You can reverse a text string with the TEXTJOIN and MID functions, by using an array constant. In the example shown, the formula in C5 is:

### How this formula works

At the core, this formula uses the MID function to extract each character of a text string in reverse order. The starting character is given as a list of numbers in descending order hardcoded as array constant:

MID(B5,{10,9,8,7,6,5,4,3,2,1},1)

The text argument comes B5, and 1 is specified for the number of characters to extract.

With the string "ABCD" in B5, the output from MID is an array that looks like this:

{"","","","","","","D","C","B","A"}

This array is fed into the TEXTJOIN function as the text1 argument, with delimiter set to an empty string (""), and ignore blank set to TRUE (entered as 1):

=TEXTJOIN("",1,{"","","","","","","D","C","B","A"})

The TEXTJOIN function concatenates each element in the array together, ignoring blanks, and returns the final result, "DCBA"

### Dynamic array

The array constant in the above example will only support string up to 10 characters. To use a dynamic array that scales to the right size, you can use a more complicated formula like this

More information about generating an array of numbers here.

### Dynamic array with SEQUENCE

Due sometime in 2019 via Office 365 subscription, the the SEQUENCE function is made to generate dynamic number arrays. With SEQUENCE, a dynamic solution looks like this:

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