Join first names and surnames
100%
CONCAT
Joining text is called concatenation. A full name needs the first name, one space and the surname; omitting the space produces a result that is technically joined but hard to read.
CONCAT accepts the cell values and a text literal for the separator. Because the formula refers to both name cells, correcting a spelling mistake in either source column updates the full name.
In C2:C5, use CONCAT to produce each person's first name, one space and surname.
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Adapted from Excel Beginners Practice Lab by Muhammad Auwal Abdulaziz (MIT).