==PROPER(text)
=PROPER("apple")
The PROPER function can be used to capitalize the first letter of each word in a string. For example, this returns "Apples".
=PROPER("APPLE")
The PROPER function is not case sensitive. For example, this returns "Apple", not "Apples".
=PROPER("XYY-020-kwp")
The PROPER function can also be used to capitalize strings with special characters. For example, this returns "Xyy-020-Kwp".
=PROPER(A1)
The PROPER function can also be used with cell references. For example, this returns "44373" because PROPER takes a numeric value and number formatting is removed.
The PROPER function is used to capitalize the first letter of a string, as well as any other letters that follow a character other than a letter. All other letters are converted to lowercase.