عوامل الزيادة والنقصان في لغة الجافا سكريبتJava Script Increment And Decrement Operators

let price = 999;
document.write("<b> Old price : "+ price +"<b><br>");
price++;
document.write("<b> New price : "+ price +"<b>");

let price = 100; 
document.write("<b> ++price : "+ ++price +"<b><br>"); /* is now 101 */
document.write("<b> Now : "+ price +"<b><br>"); 
document.write("<b> price++ : "+ price++ +"<b><br>");  /* prints 101 and then increased to 102 */
document.write("<b> Now : "+ price +"<b><br>"); 
document.write("<b> price  : "+ price  +"<b><br>"); /* is now 102 */;

let price = 100;
document.write("<b> Old price : "+ price +"<b><br>");
price--;
document.write("<b> New price : "+ price +"<b>");

let price = 100; 
document.write("<b> --price : "+ --price +"<b><br>"); /* is now 99 */
document.write("<b> Now : "+ price +"<b><br>"); /* is now 99 */
document.write("<b> price-- : "+ price-- +"<b><br>");  /* prints 99 and then increased to 98 */
document.write("<b> Now : "+ price +"<b><br>"); /* is now 29 */

var price = 5;
var total = price  ** 2;      
document.write(total);

var price = 5;
var total = price  ** 3;      
document.write(total);