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This article mainly introduces how JavaScript uses const to declare variables, the article is very detailed, has a certain reference value, interested friends must read it!

Declare variables using const

Variables declared using var and let can be changed while the script code is running. If you want the value of the variable to remain the same throughout the run of the script code, you need to use const to declare it in the following format:

Const variable name = value

It is important to note that when you use const to declare a variable, you must assign an initial value to the variable, and that value cannot be modified during the entire run of the code. In addition, variables cannot be declared multiple times. Any failure to meet any of these requirements will lead to an error.

An example of declaring a variable using const is as follows:

Const pi = 3.1415; the above is all the content of the article "how JavaScript uses const to declare variables". Thank you for reading! Hope to share the content to help you, more related knowledge, welcome to follow the industry information channel!

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