Enter 1 in A 1.

Enter 2 in A2.

Define cell A 1 as "I"

Define cell A2 as "you"

Define the naming method (taking A 1 as an example)

Point A 1

Enter "I" (without quotation marks) in the input box (this is the name box) on the left side of the formula editor.

After defining the name.

The names "I" and "you" can directly participate in the operation.

Try it? Input in A3 = I+you

The result is 3