interestRate-max (x (L/512)) MonthlyPayments L * (interestRate a)(1+interestRate /in)^(in) PUT finame + iname PUT Aceto: acctf...

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interestRate-max (x (L/512)) MonthlyPayments L * (interestRate a)(1+interestRate /in)^(in) PUT finame + iname PUT "Aceto: acctf PUT LoanType PUT "Loan Amount You PUT "Time of Loan in years"+i PUT Interest Rate +interestRate PUT "Monthly Payments Monthly Paymeauf L=100 OENO -12 "Enter Customer First Name" Loop finame != "STOP" "Enter Customer Last Name PUT 'No Loan Account not approved for Loan "Enter Loan Type Variable Fixed Interest" GET IqaaType "Enter Loan Amount "Enter Length time of Loan in years" account-random t LoanType="Variable" Enter Customer First Name" PUT "Loan Program Ended End No interestRate Amount 1000.00 MonthlyPayments -L *(interestRate a)(1+interestRate /n)^(in) / PUT finame + name PUT "Aceto: "+ acc PUT LoadType PUT "Loan Amount +15 PUT "Time of Loan in years+f interestRate -.0933 PUT Interest Rate +interestRate PUT "Monthly Payments Monthly Paymeauf 5000.00 No Y interestRate -1045 JoanAmou 10000.00 interestRate -1625 sentinel value input sentinel-controlled loop loop Key 21 22 23 24 Point 25 26 27 } } 5.5 Controlling a Loop with User Confirmation or a Sentinel Value It is a common practice to use a sentinel value to terminate the input. The preceding example executes the loop five times. If you want the user to decide whether to continue, you can offer a user confirmation. The template of the program can be coded as follows: } You can rewrite the program given in Listing 5.4 with user confirmation to let the user decide whether to advance to the next question. char continueLoop = 'Y'; while (continueLoop == 'Y') { // Execute the loop body once Another common technique for controlling a loop is to designate a special value when reading and processing a set of values. This special input value, known as a sentinel value, signifies the end of the input. A loop that uses a sentinel value to control its execution is called a sentinel-controlled loop. 3 4 Listing 5.5 gives a program that reads and calculates the sum of an unspecified number of integers. The input 0 signifies the end of the input. Do you need to declare a new variable for each input value? No. Just use one variable named data (line 12) to store the input value, and use a variable named sum (line 15) to store the total. Whenever a value is read, assign it to data and, if it is not zero, add it to sum (line 17). LISTING 5.5 SentinelValue.java 1 2 5 // Prompt the user for confirmation System.out.print("Enter Y to continue and N to quit: "); continueLoop = input.getLine().charAt(0); 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 import java.util.Scanner; public class SentinelValue { / Main method */ public static void main(String[] args) { // Create a Scanner Scanner input = new Scanner (System.in); // Read an initial data System.out.print( "Enter an integer (the input ends if it is 0): "); int data input.nextInt (); // Keep reading data until the input is 0 int sum= 0; while (data != 0) { sum += data; // Read the next data System.out.print( 5.5 Controlling a Loop with User Confirmation or a Sentinel Value 169 "Enter an integer (the input ends if it is 0): "); data input.nextInt (); } System.out.println("The sum is " + sum); Enter an integer (the input ends if it is 0): 2 Enter Enter an integer (the input ends if it is 0) 3 Enter Enter an integer (the input ends if it is 0): 4 Enter Enter an integer (the input ends if it is 0) 0 The sum is 9 Enter end of loop display result interestRate-max (x (L/512)) MonthlyPayments L * (interestRate a)(1+interestRate /in)^(in) PUT finame + iname PUT "Aceto: acctf PUT LoanType PUT "Loan Amount You PUT "Time of Loan in years"+i PUT Interest Rate +interestRate PUT "Monthly Payments Monthly Paymeauf L=100 OENO -12 "Enter Customer First Name" Loop finame != "STOP" "Enter Customer Last Name PUT 'No Loan Account not approved for Loan "Enter Loan Type Variable Fixed Interest" GET IqaaType "Enter Loan Amount "Enter Length time of Loan in years" account-random t LoanType="Variable" Enter Customer First Name" PUT "Loan Program Ended End No interestRate Amount 1000.00 MonthlyPayments -L *(interestRate a)(1+interestRate /n)^(in) / PUT finame + name PUT "Aceto: "+ acc PUT LoadType PUT "Loan Amount +15 PUT "Time of Loan in years+f interestRate -.0933 PUT Interest Rate +interestRate PUT "Monthly Payments Monthly Paymeauf 5000.00 No Y interestRate -1045 JoanAmou 10000.00 interestRate -1625 sentinel value input sentinel-controlled loop loop Key 21 22 23 24 Point 25 26 27 } } 5.5 Controlling a Loop with User Confirmation or a Sentinel Value It is a common practice to use a sentinel value to terminate the input. The preceding example executes the loop five times. If you want the user to decide whether to continue, you can offer a user confirmation. The template of the program can be coded as follows: } You can rewrite the program given in Listing 5.4 with user confirmation to let the user decide whether to advance to the next question. char continueLoop = 'Y'; while (continueLoop == 'Y') { // Execute the loop body once Another common technique for controlling a loop is to designate a special value when reading and processing a set of values. This special input value, known as a sentinel value, signifies the end of the input. A loop that uses a sentinel value to control its execution is called a sentinel-controlled loop. 3 4 Listing 5.5 gives a program that reads and calculates the sum of an unspecified number of integers. The input 0 signifies the end of the input. Do you need to declare a new variable for each input value? No. Just use one variable named data (line 12) to store the input value, and use a variable named sum (line 15) to store the total. Whenever a value is read, assign it to data and, if it is not zero, add it to sum (line 17). LISTING 5.5 SentinelValue.java 1 2 5 // Prompt the user for confirmation System.out.print("Enter Y to continue and N to quit: "); continueLoop = input.getLine().charAt(0); 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 import java.util.Scanner; public class SentinelValue { / Main method */ public static void main(String[] args) { // Create a Scanner Scanner input = new Scanner (System.in); // Read an initial data System.out.print( "Enter an integer (the input ends if it is 0): "); int data input.nextInt (); // Keep reading data until the input is 0 int sum= 0; while (data != 0) { sum += data; // Read the next data System.out.print( 5.5 Controlling a Loop with User Confirmation or a Sentinel Value 169 "Enter an integer (the input ends if it is 0): "); data input.nextInt (); } System.out.println("The sum is " + sum); Enter an integer (the input ends if it is 0): 2 Enter Enter an integer (the input ends if it is 0) 3 Enter Enter an integer (the input ends if it is 0): 4 Enter Enter an integer (the input ends if it is 0) 0 The sum is 9 Enter end of loop display result