number changed to zero

[toolb]

last number of 16 is 1 but automatically changed to zero. why

 

[Don Guillett]

IF you mean that you have 15 0's and then a 1, it would be because excel
only uses 15.

 

[Ragdyer]

Since XL only calculates to 15 digits, you can use longer data, such as
credit card numbers, by either *pre-formatting* the cell(s) as TEXT, or
precede the data with an apostrophe [ ' ], which will not be visible in the
cell, but can be seen in the formula bar.