How many bits of javascript

The number of bits mentioned in JavaScript is actually not a very accurate way of expressing it. This is because in computer science, "bit" is usually used to represent the concept of the number of binary digits.

Simply put, a binary number is a number composed of several 0s and 1s. For example, 1101 is a four-digit binary number. The inside of a computer's central processing unit (CPU) is actually composed of countless binary numbers. These binary numbers cooperate with each other to ultimately realize various operations we perform on the computer.

For the JavaScript language, there is actually no definite "bit number". In other words, JavaScript does not have specific data types like int, long, short, etc. in the C/C language.

In JavaScript, if we need to represent an integer, we only need to use the Number type. JavaScript's Number type is a 64-bit floating point number, with a range of -2^53 ~ 2^53.

Although the Number type in JavaScript actually stores floating point numbers, it will automatically convert them to integers during operation. For example, when we perform bitwise operations (such as bitwise AND, bitwise OR, right shift, etc.), Number in JavaScript will be treated as an integer.

It should be noted that due to the precision problem of JavaScript's Number type, when operating on very large or very small integers, precision may be lost. At this point, we can use some specific libraries or development tools to solve this problem.

In addition, there is a data type in JavaScript called BigInt, which is used to represent integers of any size. The number of bits of the BigInt type is not fixed and can be automatically expanded as needed. However, it should be noted that since the operation speed of BigInt type is relatively slow, performance issues need to be paid attention to in actual use.

To sum up, we can draw the following conclusion:

• In JavaScript, there is no concept of "digits".
• The Number type in JavaScript is a 64-bit floating point number, but it will be automatically converted to an integer during operation.
• The BigInt type in JavaScript can be used to represent integers of any size, but its operation speed is slow and performance issues need to be paid attention to.

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