When you select “Exponential” as the Excel display format, the numbers in that cell are displayed in scientific notation (or exponential notation). Scientific notation is a convenient way to represent large or very small numbers, displaying the number as a power of 10.
For example, the number 3000000 would appear in scientific notation as 3.00E+06. This means 3.00 x 10^6 (i.e., the number 3.00 multiplied by 10 six times). Similarly, 0.000123 is displayed as “1.23E-04”. This means 1.23 x 10^-4 (i.e., the number 1.23 multiplied by 10 to the -4th power, or 10 divided four times).
This display format is often used in fields that frequently deal with large or very small numbers, such as physics and engineering.
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