Calculator Program in JavaScript 
  
  
  
      
      
   
 
  
    
    
    
    
    
     
  
 
  
    
    
    
    
    
  
 
  
    
    
    
    
    
  
 
  
    
    
    
    
      
      
    
  
   
    
    
  
   
    
  
  
  
  
  
  
  
  
  
    
  
  
  
  
  
  
  
  
  
  
  
  
  
  
   
   
  
    
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put it into this website: https://www.w3schools.com/js/tryit.asp?filename=tryjs_myfirst
delete everything first