How to error check and bring back the loop back to the question,if the user inpu

Question

How to error check and bring back the loop back to the question,if the user inputs a letter instead of a number ? case 2: System.out.println ("Enter the amount you want to withdraw:"); withdraw = keyboard.nextInt(); /////////////////////////////////////////////////////////// switch(checkOrSave) { case 1: if(che > withdraw) { System.out.println ("Your Receipt" ); System.out.println (" Previous balance: $ " + che); balWith = che - withdraw; System.out.println (" Current balance: $ " + balWith); System.out.println (" You made a withdrawal of : $ " + withdraw); } else { System.out.println ("Not enough balance cannot withdraw"); }

Explanation / Answer

include #include #include void main(void) { int val_a; int val_b; int result; printf("Write a number A="); scanf("%d", &val_a); if(isdigit(val_a)) { printf(" Write a number B="); scanf("%d", &val_b); } else printf(" I said number. "); result = val_a + val_b; printf("%d + %d = %d", val_a, val_b, result); getch(); printf(""); \ to clear the screen } please rate me

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