Question:What do you mean by “with” statements? Write it’s syntax. 

Answer 
With statement:

1. JavaScript’s with statement was intended to provide a shorthand for writing recurring accesses to objects.
2. Instead of having to list all of the properties of an object by repeating the basic object, we can state the bulk of the object in a with statement and then the properties within the context of the with statment.

Syntax:
with (object){
  statement
}

Example:
var a, x, y;
var r = 10;
with (Math) {
  a = PI * r * r;
  x = r * cos(PI);
  y = r * sin(PI / 2);
}
 

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