These are MCQ type Aptitude Questions and Answers with Explanation. 3. Practice: Using while loops. C Do-While Loop. 2. When the condition becomes false, program control passes to the line immediately following the loop. Write a program in C++ to find the sum of first 10 natural numbers. Syntax of while loop in C programming language is as follows: while (condition) { statements; } It is an entry-controlled loop. Project: Build-a-House. 4. acknowledge that you have read and understood our, GATE CS Original Papers and Official Keys, ISRO CS Original Papers and Official Keys, ISRO CS Syllabus for Scientist/Engineer Exam, Comparison of Exception Handling in C++ and Java, Decision Making in C / C++ (if , if..else, Nested if, if-else-if ), Execute both if and else statements in C/C++ simultaneously, How to compile 32-bit program on 64-bit gcc in C and C++, Interesting facts about switch statement in C. Difference between pointer and array in C? Review: Looping. 2. Write a C program to swap first and last digits of a number, Write a C program to calculate sum of digits of a number, Write a C program to calculate product of digits of a number, Write a C program to enter a number and print its reverse. The do-while loop is similar to while loop. In C zero means false. Go to the editor. #include int main() Write a program in C to multiply two numbers without actually using the * operator but have to use both the while and do-while loops. … edit If a macro needs to be expanded in multiple lines, it is the best practice to write those lines within do{ }while(0) to avoid macro side effects. Write a C program to print all Prime numbers between 1 to n. Write a C program to find sum of all prime numbers between 1 to n, Write a C program to find all prime factors of a number. He works at Vasudhaika Software Sols. Dry-Running Example 1: The program will execute in the following manner. -2 = 0. The loop iterates while the condition is true. Write a C program to print all natural numbers in reverse (from n to 1). Writing clean code. That is again false. Open source has a funding problem. That is again false. Write a C program to find sum of all natural numbers between 1 to n. Write a C program to find sum of all even numbers between 1 to n, Write a C program to find sum of all odd numbers between 1 to n, Write a C program to print multiplication table of any number, Write a C program to count number of digits in a number, Write a C program to find first and last digit of a number. Program using the while loop In outer do-while loop while condition is 0. Which will be faster while(1) or while(2)? Write a do-while loop that asks the user to enter two numbers. An Uncommon representation of array elements, Dynamic Memory Allocation in C using malloc(), calloc(), free() and realloc(), Left Shift and Right Shift Operators in C/C++, Initialize a vector in C++ (5 different ways), Map in C++ Standard Template Library (STL), Write Interview Data Structures and Algorithms – Self Paced Course, We use cookies to ensure you have the best browsing experience on our website. - using while loop. Hence program control will come out of the inner do-while loop. close, link Example 1: This program will try to print “Hello World” 5 times. Easily attend exams after reading these Multiple Choice Questions. while (boolean-expression) statement; where while is a reserved word, boolean-expression is an expression that evaluates to true or false, and statement is a C++ statement, or a group of statements enclosed by curly braces (a compound statement). Challenge: A Loopy Landscape. Loops and conditional constructs are an integral part of any programming language. 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