JavaScript Operators:

Operators in JavaScript:

Operators are the symbols that actually operate the logic. In JavaScript we have some interesting operators as given below:

1. Basic Assignment Operator:

   = is used as basic assignment operator in JavaScript. A value at the right side is assigned to the variable on the left side. It is used for both string and numeric values.

   Example:

   var a = 7; will assign the value 7 to variable a var b = 5; will assign the value 5 to b var c = a + b ; will assign the value of (a+b) i.e 7 to variable c var str = “NIELIT”; will assign string “NIELIT” to variable str



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2. Basic Arithmatic Operators:

   JavaScript supports the following Arithmetic operators:

   Operator	Purpose	Example	Output (a = ?)
   +	Addition	a = 5 + 2;	7
   -	Subtraction	a = 5 - 2;	3
   *	Multiplication	a = 5 * 2;	10
   /	Division (for quotient)	a = 5 / 2;	2 (quotient)
   %	Division (for remainder)	a = 5 % 2;	1 (remainder)
   ++	Increment	a = 5 ; a++;	6
   --	Decrement	a = 5 ; a--;	4
   **	Exponentiation	a = 5 ** 2;	25




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3. Other Assignment Operators:

   Apart from basic assignment operator “=”, JavaScript also support combination of Assignment and Arithmetic operator as supported by several other languages. This eventually reduces the lines of code:

   Operator	Purpose	Example	Similar to:
   +=	Addition assignment	a += b	a = a + b
   -=	Subtraction assignment	a -= b	a = a - b
   *=	Multiplication assignment	a *= b	a = a * b
   /=	Division (for quotient) assignment	a /= b	a = a / b
   %=	Division (for remainder) assignment	a %= b	a = a % b
   **=	Exponentiation assignment	a **= b	a = a ** b




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4. Comparison Operators:

   JavaScript supports standard comparison operators as given below:

   Operator	Purpose	Example	Output (a = ?)
   ==	To check equality of value	a = 5 == 2;	false
   ===	To check equality of value and type	a = 5 === "five";	false
   !=	To check inequality of value	a = 5 != 2;	true
   !==	To check inequality of value and type	a = 5 !=== "five";	true
   >	To check if greater	a = 5 > 2;	true
   <	To check if smaller	a = 5 < 2;	false
   >=	To check if greater or equal	a = 5 >= 2;	true
   <=	To check if smaller or equal	a = 5 <= 2;	false




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5. Logical Operators:

   JavaScript provides three Logical operators:

   Operator	Purpose	Example	Output (a = ?)
   &&	To combine condition in logical AND	a = (5>2) && (3<1);	false
   ||	To combine condition in logical OR	a = (5>2) || (3<1);	true
   !	To negate the condition	a = !(5>2);	false




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6. Concatenation Operator:

   = The + and += operator may also be used be used to add or concatenate strings. It may also be used with a combination of strings and numbers and in this case output will be a string.

   Example 1:

   var str1 = "NIELIT"; var str2 = "DELHI"; var str3 = str1 + " " + str2;
   
   

   The output value of str3 will be:

   “NIELIT DELHI”
   
   

   Example 2:

   var a = 5 + 6; //11 and is number var b = "5" + 6; //56 and is a string var c = "Good" + 9; //Good9 and is a string



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7. Ternary or Conditional Operator:

   The ternary operator assigns a value to a variable based on the condition.

   Syntax:

   variablename = (condition) ? value1:value2
   
   

   Example:

   IsMinor = (age < 18) ? "Yes":"No";
   
   

   Here in this example, if the value of variable a is less than 18, the string “Yes” is assigned to the variable IsMinor otherwise “No”.