You are watching: What does the e on the calculator mean

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On a calculator display, E (or e) represents exponent that 10, and also it"s always followed by another number, which is the value of the exponent. Because that example, a calculator would display the number 25 sunshine as either 2.5E13 or 2.5e13. In other words, E (or e) is a short type for scientific notation.

Science is complete of very big and very little numbers that are an overwhelming to read and write. For example, the massive of the earth is 5,970,000,000,000,000,000,000,000 kilograms, while the massive of a hydrogen atom is 0.00000000000000000000000000167 kilograms. Clinical notation makes these numbers much easier to take care of by expressing the 0"s as a power of ten. Utilizing this notation, the mass of the earth becomes 5.97 × 1024 kg, and also the fixed of a hydrogen atom i do not care 1.67 × 10-27 kg. Rather of numbers with long strings the zeros the are complicated to count and even more daunting to display screen on a tiny screen, you have much more manageable decimal fractions and exponents the 10.

In its created form, clinical notation would certainly look strange on a calculator. It would be confusing and it wouldn"t to the right on a small display. To protect against these problems, manufacturers developed a symbol for "X 10." This prize is one of two people E or e, depending on the calculator. This letter is constantly followed by a number, which is the exponent to which 10 is raised.

On a calculator display, the massive of the earth would be presented as 5.97E24 (or 5.97e24). The number 5.97 is the argument and also the number 24 is the exponent. Similarly, the mass of a hydrogen atom would certainly be 1.67E-27 (or 1.67e-27).

It"s simply as complicated to beat in long strings the zeroes ~ above a calculator pad as it is to create them on paper, so must calculators have actually a shortcut. It"s the EE key. To get in a number in clinical notation, an initial input the argument, then push the EE an essential and go into the exponent. For example, to go into the mass of the earth, crucial in 5.97, then push the EE key and enter 24. The display screen will read 5.97E24 (or 5.97e24). Keep in mind that the number will show up with all its zeroes if castle fit on the screen. Because that example, if you crucial in 1.2 EE 5, the display screen will present 120,000.

Most scientific calculators devote a special key to Euler"s number, because it is among the most important irrational number in mathematics and also enters right into all kinds of scientific calculations. This is the "e" key. Push it, and Euler"s number will appear in your display to the accuracy the screen allows. The scientific calculator on an iPhone, because that example, reflects 2.718281828459045. In addition, most calculators likewise have one "ex" key. Get in a number, push this vital and the display screen will display the worth of e elevated to the exponent you entered. In neither of these cases does "e" have the same definition as it does when it appears in the display.

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Chris Deziel hold a Bachelor's level in physics and a Master's level in Humanities, He has actually taught science, math and also English at the university level, both in his aboriginal Canada and also in Japan. He began writing virtual in 2010, offering information in scientific, social and valuable topics. His creating covers science, math and home improvement and design, and religion and also the eastern healing arts.