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THE WORK HORSE "="

 


  One cannot think of  a mathematical step without 'is equal to'.  It balances right hand side and left hand side.  It aids simplification and manipulation of a mathematical expression.

 example:
2(A+B)  = C
2A+2B  = C
        2A = C-2B
          A = C-2B/2

   In an electronic calculator,  the pressing of ' = " sign executes an asthmatic expression  or simply calculates. 

      In computer languages, it plays very important role.
                       
                                       A = B
  When a computer looks at this expression, the value stored in the location named B is just transferred to the storage named A.  After execution both A and B will have the same value and be equal. 
 Now consider this.

 1.A = 5
2.A = A+1
3.PRINT A

   Here in the first step, the value 5 is stored in memory A.  In the execution of second line, 1 is added to the already stored value in A and now the A will contain 6.   In the third line, 6 will be printed.  This is how the computer languages like java, python works. 

 Next:
     If   S = 100%    then display "download successful" else "failed".  In this kind of logic statement, value in S and 100% is compared and the appropriate action is taken. 

      Hence  "="  is a powerful symbol in many fields.     

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