Concept:
The CONCAT function in Microsoft Excel is used to join (concatenate) two or more text strings into a single string.
It replaces the older CONCATENATE() function in newer versions of Excel.
Its syntax is:
\[
\boxed{\texttt{=CONCAT(text1, text2, \ldots)}}
\]
Step 1: Understand the CONCAT function.
The CONCAT function combines multiple text values into one.
Example:
If
\[
A1=\text{"Hello"}, \qquad B1=\text{"World"}
\]
then
\[
\boxed{\texttt{=CONCAT(A1," ",B1)}}
\]
returns
\[
\boxed{\text{"Hello World"}}
\]
Step 2: Know similar text functions.
Excel provides several text functions:
{|l|l|}
Function & Purpose
CONCAT & Joins text strings
TEXTJOIN & Joins text with a delimiter
LEFT & Extracts characters from the left
RIGHT & Extracts characters from the right
MID & Extracts characters from the middle
LEN & Counts the number of characters
Step 3: Analyse the options.
• Join -- Not an Excel function.
• Concat -- Correct; joins text strings.
• Merge -- Not an Excel text function.
• Combine -- Not an Excel function.
Step 4: Final conclusion.
Therefore, the function that joins text strings is:
\[
\boxed{\text{CONCAT}}
\]