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  1. 1. Submitted by Jenine Rose V. Castro
  3. 3.  Programming languages provide various control structures that allow for more complicated execution paths. A loop statement allows us to execute a statement or group of statements multiple times and following is the general from of a loop statement in most of the programming languages.
  4. 4.  FOR WHILE DO WHILE
  5. 5.  The statements in the for loop repeat continuously for aspecific number of times. The while and do- while loops repeat until a certain condition is met. The for loop repeats until a specific count is met. Use a for loop when the number of repetition is know, or can be supplied by the user
  6. 6.  The while loop allows programs to repeat a statement or series of statements, over and over, as long as a certain test condition is true.
  7. 7.  In most computer programming languages, a do while loop, sometimes just called a while loop, is a control flow statement that allows code to be executed once based on a given Boolean condition Unlike for and while loops, which test the loop condition at the top of the loop, the do...while loop checks its condition at the bottom of the loop.
  8. 8.  Switch case statements are a substitute for long if statements that compare a variable to several "integral" values ("integral" values are simply values that can be expressed as an integer, such as the value of a char). The basic format for using the switch case in the programming is outlined below. The value of the variable given into switch is compared to the value following each of the cases, and when one value matches the value of the variable, the computer continues executing the program from that point.
  9. 9.  In programming, a switch, case, select or inspect statement is a type of selection control mechanism that exists in most imperative programming languages such as Pascal, Ada, C/C++, C#, Java, and so on. It is also included in several other types of Programming languages. Its purpose is to allow the value of a variable or expression to control the flow of program execution via a multiway branch (or "go to", one of several labels). The main reasons for using a switch include improving clarity, by reducing otherwise repetitive coding, and (if the heuristics permit) also offering the potential for faster execution through easier compiler optimization in many cases.
  10. 10. #include <iostream>#include <stdlib.h>using namespace std;void welcome(); // switch statement based on the choice variablechar getChar(); switch (choice) // notice no semicolonvoid displayResponse(char choice); { case A: // choice was the letter Aint main(int argc, char *argv[]) case a: // choice was the letter a{ cout << "your awesome dude.nn"; char choice; // declares the choice variable break; // this ends the statements for case A/a case B: // choice was the letter b welcome(); // This calls the welcome function case b: // choice was the letter b choice = getChar(); // calls getChar and returns the value for choice cout << "you will find your lovelife.nn"; displayResponse(choice); // passes choice to displayResponse function break; // this ends the statements for case B/b case C: // choice was the letter C case c: // choice was the letter c system("PAUSE"); cout << "your will won the lottery.nn"; return 0; break; // this ends the statements for case C/c case D: // choice was the letter D} // end main case d: // choice was the letter d// welcome function displays an opening message to cout << "your so ugly!!.nn";// explain the program to the user break; // this ends the statements for case D/dvoid welcome() default: // used when choice falls out of the cases covered above{ cout << "You didnt pick a letter a, b or c.nn"; cout << "This program displays different messages dependingn"; again = getChar(); // gives the user another try displayResponse(again); // recalls displayResponse with cout << "on which letter is entered by the user.n"; new character cout << "Pick a letter a, b, c or d to see whatn"; break; } // end of switch statement cout << "the program will say.nn"; } // end displayResponse function} // end of welcome function// getChar asks the user for a letter a, b or c.// The character is returned to where the function was called.char getChar(){ char response; // declares variable called response cout << "Please type a letter a, b, c and d: "; // prompt for letter cin >> response; // gets input from user and assigns it to response return response; // sends back the response value
  11. 11. #include <iostream.h>int main(void) { int x = 0; int y = 0; bool validNumber = false; while (validNumber == false) { cout << "Please enter an integer between 1 and 10: "; cin >> x; cout << "You entered: " << x << endl << endl; if ((x < 1) || (x > 10)) { cout << "Your value for x is not between 1 and 10!" << endl; cout << "Please re-enter the number!" << endl << endl; } else validNumber = true; } cout << "Thank you for entering a valid number!" << endl; return 0;  }
  12. 12.  #include <iostream> using namespace std; main() { int num1, num2; char again = y; while (again == y || again == Y) { cout << "Enter a number: "; cin >> num1; cout << "Enter another number: "; cin >> num2; cout << "Their sum is " << (num1 + num2) << endl; cout << "Do you want to do this again? "; cin >> again; } return 0; }
  13. 13. #include <iostream>#include <cmath> }using namespace std; cout <<"nSeconds falling distancen";//prototype cout <<"---------------------------------------int fallingdistance(); n";//main function for ( count = 1; count <= time; count++) {int main() distance = .5 * 9.8 *{ pow(time, 2.0); int count = 1 ; cout << count << " int time; " << distance <<" meters"<< endl; double distance ; cout << "Please enter time in 1 } system ("pause");through 10 seconds.nn"; return 0; } time = fallingdistance(); // falling distance function for a return value in seconds transfer to time while ( time < 1 || time > 10) int fallingdistance () { cout << "Must enter between 1 and { int seconds;10 seconds, please re-enter.n"; cin >> seconds; time = fallingdistance(); return seconds; }
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