You are watching: What does the e on a calculator mean
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On a calculator display, E (or e) means exponent that 10, and it"s always followed by another number, i beg your pardon is the worth of the exponent. Because that example, a calculator would show the number 25 trillion as one of two people 2.5E13 or 2.5e13. In other words, E (or e) is a short type for scientific notation.
Science is full of very huge and very tiny numbers the are difficult to read and also write. Because that example, the mass of the planet is 5,970,000,000,000,000,000,000,000 kilograms, while the massive of a hydrogen atom is 0.00000000000000000000000000167 kilograms. Scientific notation renders these numbers less complicated to handle by express the 0"s as a power of ten. Utilizing this notation, the mass of the earth becomes 5.97 × 1024 kg, and the mass of a hydrogen atom becomes 1.67 × 10-27 kg. Rather of number with long strings that zeros the are challenging to count and also even more challenging to display on a little screen, friend have an ext manageable decimal fractions and exponents that 10.
In its written form, clinical notation would certainly look weird on a calculator. It would be confusing and also it wouldn"t to the right on a tiny display. To prevent these problems, manufacturers developed a symbol for "X 10." This prize is one of two people E or e, depending upon the calculator. This letter is always followed by a number, which is the exponent come which 10 is raised.
On a calculator display, the massive of the earth would be displayed as 5.97E24 (or 5.97e24). The number 5.97 is the argument and also the number 24 is the exponent. Similarly, the fixed of a hydrogen atom would certainly be 1.67E-27 (or 1.67e-27).
It"s simply as difficult to beat in long strings the zeroes top top a calculator pad as it is to write them on paper, so have to calculators have actually a shortcut. It"s the EE key. To get in a number in clinical notation, first input the argument, then press the EE crucial and go into the exponent. Because that example, to go into the massive of the earth, vital in 5.97, then press the EE vital and enter 24. The display screen will read 5.97E24 (or 5.97e24). Note that the number will appear with all its zeroes if lock fit on the screen. For example, if you an essential in 1.2 EE 5, the screen will show 120,000.
Most clinical calculators dedicate a special crucial to Euler"s number, due to the fact that it is among the most essential irrational number in mathematics and also enters right into all kinds of clinical calculations. This is the "e" key. Push it, and Euler"s number will show up in your screen to the accuracy the display allows. The scientific calculator on an iPhone, for example, shows 2.718281828459045. In addition, most calculators likewise have one "ex" key. Get in a number, push this an essential and the display will display the worth of e increased to the exponent you entered. In neither of these cases does "e" have the same an interpretation as that does as soon as it appears in the display.
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Chris Deziel holds a Bachelor's degree in physics and also a Master's level in Humanities, He has actually taught science, math and also English in ~ the university level, both in his indigenous Canada and in Japan. He started writing digital in 2010, offering details in scientific, cultural and helpful topics. His composing covers science, math and also home advancement and design, and religion and the eastern healing arts.