java - How to loop user input until a sum is reached? -


i new java , stackoverflow (so hope question , answer aren't posted on here). writing code vending machine , need create loop continues ask user input until cost of item reached. how go this?

        system.out.println("please enter payment of: $" + totalcost); // asking client pay amount     double pay1; // name given first value of money client enters     pay1 = keyboard.nextint();         if (pay1 > totalcost) {       system.out.println("you entered: $" + pay1);       system.out.println("change needed: $" + (pay1 - totalcost));     }   else {       system.out.println("you entered: $" + pay1);       system.out.println("please enter payment of: $" + (totalcost - pay1));             }     double pay2; // next value of money input customer     pay2 = keyboard.nextint();     double totalpaid = (pay1 + pay2);     if (totalpaid > totalcost) {       system.out.println("you entered: $" + pay2);       system.out.println("change needed: $" + (totalpaid - totalcost));   } else {       system.out.println("you entered: $" + pay2);       system.out.println("please enter payment of: $" + (totalcost -          totalpaid));     }     }     }

can more specific? pseudo code this:

while(money < desiredmoney) {     askformoney(); }

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