assignment to constant variable

The error "assignment to constant variable" occurs when you try to change the value of a variable that has been declared as a constant. In most programming languages, constants are declared using the keyword "const" or a similar syntax. Once a constant is assigned a value, it cannot be changed throughout the program execution.

For example, in JavaScript, you might encounter this error if you try to reassign a value to a constant variable:

const PI = 3.14;
PI = 3.14159; // Error: Assignment to constant variable

To fix this error, you should either declare the variable as mutable (using `let` or `var`, depending on the language), or avoid reassigning values to constants.

相关问题

Assignment to constant variable. TypeError: Assignment to constant variable.

这个错误通常表示你正在尝试修改一个被声明为常量的变量。在 JavaScript 中，常量使用 `const` 声明，一旦被声明，它的值就不能被修改。因此，如果你尝试给一个常量赋新值，就会出现 "Assignment to constant variable" 错误。

例如：

const x = 5;
x = 10; // 报错：Assignment to constant variable.

解决方法是使用 `let` 关键字声明一个可变变量，或者确保你不会在代码中尝试修改常量的值。

Assignment to constant variable

回答: 这个错误是因为我们试图给一个常量变量赋值，而常量的值是不能被修改的。在ES6标准中引入了新的关键字const来定义常量，它具有块级作用域，且定义的常量必须赋予初始值。而使用let定义的变量是可以进行赋值操作的。所以，解决这个错误的方案就是避免给常量赋值。<span class="em">1</span>
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