জাভাস্ক্রিপ্ট : অপারেটর

INDEX

Arithmetic Operators

  <script>
      var x=3; 
      var y= 6;
      var z= x + y; // Here plus ( +) sign is used as a arithmetic operator.
      alert( z); // output: 9
  </script>

  <script>
      var x=13; 
      var y= 5;
      var z= x % y; // Here mod ( %) sign is used as a arithmetic operator. It is used to determine the reminder of this operation.
      alert( z); // output: 3
  </script>

Assignment Operators

  <script>
      var x=3; //Here equal sign (=) is used as assignment operator
      alert( x); // output: 3
  </script>

  <script>
      var x=3; //Here equal sign (=) is used as assignment operator
      x+=4; // x=x+4 can be used instead of  x+=4 .Here  plus equal sign (+=) is work as add and assign
 
      alert( x); // output: 7;
  </script>

  <script>
      var x=10; // Here equal sign (=) is used as assignment operator
      x-=4; // x=x-4 can be used instead of  x-=4. Here minus equal (-=) is work as substract and assign
     
      alert( x); // output: 6;
 
  </script>

  <script>
      var x=3; //Here equal sign (=) is used as assignment operator
      x*=5; // x=x*5 can be used instead of  x*=5  Here minus equal (*=) is work as multiply and assign
     
      alert( x); // output: 15;
  </script>

<script>
      let x=1;
      document.write(x );//1
      x=3;
      document.write(x );//3
      x=x+2;
      document.write(x );//5
      x-=1;//x=x-1
      document.write(x );//4
      x*=2;// x=x*2;
      document.write(x );//8
      x/=4;//x=x/4;
      document.write(x );//2
      x%=2;//x=x%2;
      document.write(x );//0
      x++;//x=x+1
      document.write(x );//1
 
      document.write(x++);//1 |  1st. print 2nd. ++
      document.write(x--);//2 |  1st. print 2nd. --
      document.write(++x);//2 |  1st. ++ 2nd. print   
      document.write(x );//2
  
 
    </script>

Comparison Operators

  <script>
      var x=3; 
      var y=2;       
      var z=x>y; // Here (>) is a comparison operator. (x>y) is called simple Boolean expression
     
      alert( z); // output: true;
  </script>

  <script>
      var x=3; 
      var y="3";       
      var z=x==y; // Here (==) is a comparison operator. (x==y) is called simple Boolean expression
     
      alert( z); // output: true;
  </script>

  <script>
      var x=3; 
      var y="3";       
      var z=x===y; // Here (===) is a comparison operator. (x===y) is called simple Boolean expression
     
      alert( z); // output: false;
  </script>

Logical Operators

  <script>
      var a=3; 
      var b=2;
      var c=5;
      var d=9;       
 
      var z=(a>b ) && (c<d); // Here && is a logical operator.  Keep in mind, more than one simple Boolean express combine with logical operator to make a compound Boolean expression. So (a>b ) && (c<d) is a compound Boolean expression.
     
      alert( z); // output: true;
  </script>

Bitwise Operators

  <script>
      var x=3<<1; //Here Left-shift (<<) is a Bitwise operator     
      alert( x); // output: 6;
  </script>

Other Special Operators

  <script>
     var x=2;
     var z=(x>0)?"Positive Number":"Negative Number"; //Here Left-shift (?: ) is a ternary operator     
      alert( z); // output: Positive Number;
  </script>