What is e in computer

The "e" of computer is the symbol of scientific notation. The letter "e" is used as the exponent separator in scientific notation, which means "multiplied to the power of 10". In scientific notation, one Numbers are usually written in the form M × 10^E, where M is a number between 1 and 10 and E represents the exponent.

# Operating system for this tutorial: Windows 10 system, Dell G3 computer.

The computer's e is the scientific notation symbol, and the letter "e" is used as the exponent separator in scientific notation. It means "multiplied by 10 to the power of 10". In scientific notation, a number is usually written as M × 10^E, where M is a number between 1 and 10 (called the mantissa or significant figure) and E represents the exponent.

The specific usage is as follows:

1. If the mantissa (M) is a number in the integer part, move the decimal point to the right by E places, and the result will be the original number.

   • For example: 3.14e2 means 3.14 × 10^2, which is 314.

2. If the mantissa (M) has a decimal part, move the decimal point to the right by E places, and the result is the original number. At the same time, if E is a positive number, it means that the value becomes larger; if E is a negative number, it means that the value becomes smaller.

   • For example: 2.5e-3 means 2.5 × 10^(-3), which is 0.0025.

The main purpose of scientific notation is to express very large or very small numbers in a simpler way, which is useful for dealing with extreme values ​​in the fields of physics, astronomy, chemistry, etc. very useful. In computers, scientific notation is also commonly used to represent floating point numbers or process big data.

It should be noted that in different programming languages ​​and applications, different symbols or keywords may be used to represent scientific notation. Some languages ​​use "e", some use "E" or "E". Therefore, in specific applications, you may need to consult relevant documents or language specifications to determine the correct usage.

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