What does void mean in TypeScript?

The void type denotes the absence of having any type at all. It is a little like the opposite of the any type. Typically, you use the void type as the return type of functions that do not return a value.

What does void do in JavaScript?

void is an important keyword in JavaScript which can be used as a unary operator that appears before its single operand, which may be of any type. This operator specifies an expression to be evaluated without returning a value.

What is a void operator?

Description. This operator allows evaluating expressions that produce a value into places where an expression that evaluates to undefined is desired. The void operator is often used merely to obtain the undefined primitive value, usually using ” void(0) ” (which is equivalent to ” void 0 “).

Is void undefined?

void has special meaning in function return types, and is not an alias for undefined .

What is return type void?

In computer programming, when void is used as a function return type, it indicates that the function does not return a value. When void appears in a pointer declaration, it specifies that the pointer is universal. When used in a function’s parameter list, void indicates that the function takes no parameters.

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What is void keyword?

The void keyword is used as the return type of functions that do not return any value. It evaluates the given expression and returns undefined. It is an important JavaScript keyword that might be used as a unary operator and appears before the single operand of any type.

What is the significance of void keyword?

When used as a function return type, the void keyword specifies that the function doesn’t return a value. When used for a function’s parameter list, void specifies that the function takes no parameters. When used in the declaration of a pointer, void specifies that the pointer is “universal.”

How do you write a void function?

A void function has a heading that names the function followed by a pair of parentheses. The function identifier/name is preceded by the word void. The parameter list with the corresponding data type is within the parentheses. The body of the function is between the pair of braces.

Is void a unary operator?

A unary operation is an operation with only one operand. This operand comes either before or after the operator.


Operator Explanation
delete Deletes specific index of an array or specific property of an object
void Discards a return value of an expression.

What is void in react?

void is another type that doesn’t exist in JavaScript. It is generally used to represent a non-returning function.

What is void in angular?

Similar to languages like Java, void is used where there is no data. For example, if a function does not return any value then you can specify void as return type.

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How do I fix JavaScript void 0?

How can I fix javascript:void(0) errors?

  1. Make sure Java is properly installed.
  2. Enable Java.
  3. Reload the webpage.
  4. Remove cookies.
  5. Clear the cache.

What is void in C# with example?

You use void as the return type of a method (or a local function) to specify that the method doesn’t return a value. You can also use void as a referent type to declare a pointer to an unknown type. For more information, see Pointer types. You cannot use void as the type of a variable.

What is void variable?

Declaring a variable in C is about telling the compiler to reserve space in memory, the size of memory reserved being dependent on the type used. A void variable would be a variable which has no type and hence occupies no space at all, making it completely meaningless to declare.

Is void data type?

Void is considered a data type (for organizational purposes), but it is basically a keyword to use as a placeholder where you would put a data type, to represent “no data”.