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Fundamentals Programming LOOPS Laboratory 1 Syntax Example Flowchart // for-loop for ( init ; test ; post-proc ) { body ; } // Sum from 1 to 1000 int sum = 0; for (int number = 1; number <= 1000; + +number) { sum += number; } // while-do while ( condition ) { body ; } int sum = 0, number = 1; while (number <= 1000) { sum += number; ++number; } // do-while do { body ; } while ( condition ) ; int sum = 0, number = 1; do { sum += number; ++number; } while (number <= 1000); Barbara Fryc
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Fundamentals Programming LOOPS Laboratory 1 Example 1 Try the following program, which sums all the integers from 1 to an upperbound provided by the user, using a so-called while-loop . #include <iostream> using namespace std; int main() { int sum = 0; // Declare an int variable sum to accumulate the numbers // Set the initial sum to 0 int upperbound; // Sum from 1 to this upperbound // Prompt user for an upperbound cout << "Enter the upperbound: "; cin >> upperbound; // Use a loop to repeatedly add 1, 2, 3,..., up to upperbound int number = 1; while (number <= upperbound) { sum = sum + number; // accumulate number into sum ++number; // increment number by 1 } // Print the result
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