Excel absolutely can open csv files with a double click if you associate the file type extension.

▲ boshomi 4 days ago | parent [-]

You should never blindly trust Excel when using CSV files. Try this csv file:

    COL1,COL2,COL3 
    5,"+A2&C1","+A2*8&B1"

	▲	IAmBroom 4 days ago \| parent \| next [-]
		True, but not the point here. "You can" and "You should as a general rule" are not the same.
	▲	0x3444ac53 3 days ago \| parent \| prev [-]
		Hesitant to actually try to open this, what does it do?