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What is EXP on a calculator?

Updated: 4/28/2022
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14y ago

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This a standard button on most scientific calculators, it allows you to enter exponential values easily.Say you wanted to enter 1000000 in your calculator, rather than pressing 1 with 6 zeros after it, you can simply press exp then the number of digits you want (which in this case is 6)

This is makes work in science and technical fields a lot easier where you often encounter very very large and very very small numbers that you perhaps wouldn't encounter in everyday life.

For example physical constant like the speed of light is ~299000000 meters per second or planck's constant which is 0.00000000000000000000000000000000006626 joule per second (the smallest unit of energy in a QM system). You can easily imagine that punching in 34 zeros can quickly become confusing and tedious. So for the speed of light simple press 2.99 then exp then 8 or for planck's constant press 6.626 then exp then -34.

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Q: What is EXP on a calculator?
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First of all, you have to have a scientific calculator, one that supports scientific notation. (As far as I know, all scientific calculators do.) The scientific calculator should have a special key labelled something like EXP. To input (for example) 2.3 million, you would type 2.3 EXP 6 (where EXP is short for "times 10 to the power...").


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Most computers, like the one you're using to access this site, have a calculator function that will do simple math like this for you. For that matter, Google will do it if you type exp(i) into the search box.