5.5 pearson 2/21/17 – Flashcards
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the body of a do..while loop is always executed at least
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once
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Given an int variable k that has already been declared, use a do...while loop to print a single line consisting of 53 astericks. Use no variables other than k.
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k = 0; do{ System.out.print("*"); k++; }while (k < 53);
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Given an int variable n that has already been declared and initialized to a positive value, use a do...while loop to print a single line consisting of n astericks. Use no variables other than n.
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do{ System.out.print("*"); n--; } while (n > 0);
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Given an int variable n that has been initialized to a positive value and, in addition, int variables k and total that have already been declared , use a do...while loop to compute the sum of the cubes of the first n whole numbers, and store this value in total. Use no variables other than n, k, and total.
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k = 0 ; total = 0; while (k <= n){ total = total + (k*k*k); k++; } but, this is not a do while
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You need to write a loop that will keep reading and adding integers to a sum, until the sum reaches or exceeds 21. The numbers are less than 20 and the sum is initially 0. Which is the preferred loop construct to use?
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do while loop
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You need to write a loop that reads integers and adds them to a sum as long as they are positive. Once 0 or a negative value is read in your loop terminates. Which is the preferred loop construct to use?
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while loop
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Given int variables k and total that have already been declared, use a do...while loop to compute the sum of the squares of the first 50 counting numbers, and store this value in total. Thus your code should put 1*1 + 2*2 + 3*3 +... + 49*49 + 50*50 into total. Use no variables other than k and total.
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k = 1; total = 0; while ( k <= 50 ){ total = total + ( k * k ); k = k + 1; }
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You need to write a loop that will repeat exactly 125 times. Which is the preferred loop construct to use?
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for loop
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java In the Happy Valley School System, children are classified by age as follows: less than 2, ineligible 2, toddler 3-5, early childhood 6-7, young reader 8-10, elementary 11 and 12, middle 13, impossible 14-16, high school 17-18, scholar greater than 18, ineligible Given an int variable age, write a switch statement that prints out, on a line by itself, the appropriate label from the above list based on age.
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Java In the Happy Valley School System, children are classified by age as follows: less than 2, ineligible 2, toddler 3-5, early childhood 6-7, young reader 8-10, elementary 11 and 12, middle 13, impossible 14-16, high school 17-18, scholar greater than 18, ineligible Given an int variable age, write a switch statement that prints out, on a line by itself, the appropriate label from the above list based on age. Posted in: Java, Learn To Code | May 28, 201420925, Java LANGUAGE: JAVA CHALLENGE: In the Happy Valley School System, children are classified by age as follows: less than 2, ineligible 2, toddler 3-5, early childhood 6-7, young reader 8-10, elementary 11 and 12, middle 13, impossible 14-16, high school 17-18, scholar greater than 18, ineligible Given an int variable age, write a switch statement that prints out, on a line by itself, the appropriate label from the above list based on age. SOLUTION: ? switch (age){ case 0: case 1: System.out.println("ineligible"); break; case 2: System.out.println("toddler"); break; case 3: case 4: case 5: System.out.println("early childhood"); break; case 6: case 7: System.out.println("young reader"); break; case 8: case 9: case 10: System.out.println("elementary"); break; case 11: case 12: System.out.println("middle"); break; case 13: System.out.println("impossible"); break; case 14: case 15: case 16: System.out.println("high school"); break; case 17: case 18: System.out.println("scholar"); break; default: System.out.println("ineligible"); }
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java HTTP is the protocol that governs communications between web servers and web clients (i.e. browsers). Part of the protocol includes a status code returned by the server to tell the browser the status of its most recent page request. Some of the codes and their meanings are listed below: 200, OK (fulfilled) 403, forbidden 404, not found 500, server error Given an int variable status, write a switch statement that prints out the appropriate label from the above list based on status.
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switch( status ){ case 200: cout << "OK (fulfilled)"; break; case 403: cout << "forbidden"; break; case 404: cout << "not found"; break; case 500: cout << "server error"; break; }
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java Given an int variable named yesCount and another int variable named noCount and an int variable named response write the necessary code to read a value into response and then carry out the following: if the value typed in is a 1 or a 2 then increment yesCount and print out "YES WAS RECORDED" if the value typed in is a 3 or a 4 then increment noCount and print out "NO WAS RECORDED" If the input is invalid just print the message "INVALID" and do nothing else. ASSUME the availability of a variable, stdin, that references a Scanner object associated with standard input.
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response = stdin.nextInt(); if (response == 1 || response == 2){ yesCount++; System.out.print("YES WAS RECORDED"); }else if (response == 3 || response == 4){ noCount++; System.out.print("NO WAS RECORDED"); }else System.out.print("INVALID");
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Strings can be used in a switch statement's controlling expression and in its
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case labels
