- A'105'
- B'55'
- C55
- D'10'
The result of the code is '105'
.
In JavaScript, the + operator has two different meanings depending on the type of the operands.
If at least one of the operands is a string,
the +
operator performs string concatenation.
In this case, the first 5 is converted to the string '5'
,
and the second 5 is also converted to the string '5'
, so the final result is '105'
.
The result of the code is 0
.
In JavaScript, the -
operator performs subtraction if both operands are numbers. .
In this case, the string '5'
is converted to the number 5, so the final result is 5 - 5 = 0
..
The result of the code is false.
The &&
operator in JavaScript performs a logical and operation, which means that it returns true only if both operands are truthy.
In this case, the first operand is truthy (true), but the second operand is false then the result is also false
The instanceof
operator in JavaScript is used to determine whether an object is an instance of a particular constructor or class.
In this case, the variable obj has been assigned an empty object.
The instanceof
operator is called on obj, with Object as the right operand.
Since obj is an instance of the Object constructor, the instanceof
operator will return true.
The Symbol data type in JavaScript is a primitive data type that represents a unique identifier.
Symbols are created using the Symbol constructor, which takes an optional string description as an argument.
In this case, a new symbol is created using the Symbol constructor, with the string "foo" as the description.
The typeof
operator is called on the symbol, which returns the string "symbol".
The Map
data type in JavaScript is a constructor that creates a new map object, which is a collection of key-value pairs.
The Map
constructor creates a new map object when it is called using the new keyword.
In this case, a new map object is created using the Map
constructor, and is assigned to the variable map.
The instanceof
operator is called on map, with Map
as the right operand.
Since map is an instance of the Map
constructor, the instanceof
operator will return true.
The <<
operator in JavaScript is the left shift operator, which performs a bitwise left shift operation on its operands.
In this case, the <<
operator is called on x
and y
, with x
as the first operand and y
as the second operand.
Since x
is 10
and y
is 20
, the result of the <<
operator will be the left shift of the binary representation of 10
by 20
bits, which is 100000
in decimal.
The >>
operator in JavaScript is the right shift operator, which performs a bitwise right shift operation on its operands.
In this case, the >>
operator is called on x and y, with x
as the first operand and y
as the second operand.
Since x is 10
and y is 20
, the result of the >>
operator will be the right shift of the binary representation of 10
by 20
bits, which is 0
in decimal.
The in
operator in JavaScript is used to determine whether an object has a particular property.
In this case, the in
operator is called on x
and y
, with x as the left operand and y as the right operand.
Since y is a string and does not have any properties, the in operator will return false
.
The ^
operator in JavaScript is the bitwise XOR
operator, which performs a bitwise XOR
operation on its operands.
In this case, the ^
operator is called on x
and y
, with x as the first operand and y as the second operand.
Since x is 10
and y is 20
, the result of the ^
operator will be the bitwise XOR
of the binary representations of 10
and 20
, which is 30
in decimal.