priya

The delete operator is used to delete all the variables and objects used in the program,but it does not delete variables declared with var keyword. In web development, particularly in JavaScript, the delete operator is used to remove a property from an object. When applied to an array element, it can also remove the element … Read more

=== is strict equality operator ,it returns true only when the two operands are having the same value without any type conversion. In JavaScript, the === operator is called the “strict equality operator.” It compares two values, checking both their value and their data type to determine if they are equal. Here’s how it works: … Read more

Undeclared variables are those that are not declared in the program (do not exist at all),trying to read their values gives runtime error.But if undeclared variables are assigned then implicit declaration is done . Undefined variables are those that are not assigned any value but are declared in the program.Trying to read such variables gives … Read more

No.Javascript does not have block level scope,all the variables declared inside a function possess the same level of scope unlike c,c++,java. In JavaScript, variables have either global scope or function scope, but not block scope. This means that variables declared within a function are local to that function and not accessible outside of it. This … Read more

It is perfectly legal to assign a number to a variable and then assign a string to the same variable as followsexample i = 10; i = “string”; This is called variable typing In JavaScript, variable typing refers to the dynamic typing nature of the language. This means that variables in JavaScript can hold values … Read more