Do/While Loop

As an alternative to while loop you can use do/while loop. The difference is that the do/while loop will execute the code in the block once before checking if the condition returns true.

Syntax:

The example of using do/while loop:


              12345
            
int i = 0;
do {
 &nbsp;&nbsp;&nbsp;&nbsp;   cout << i << endl;
  &nbsp;&nbsp;&nbsp;&nbsp;  i++;
} while (i < 3);

The first iteration will be firstly executed and i becomes 1. By the third iteration, i becomes 3 and the condition returns false after that, and do/while loop stops.

Pay attention, that the first iteration will be executed even if the condition is always false:


              12345
            
int i = 0;
do {
&nbsp;&nbsp;&nbsp;&nbsp;    cout << i << endl;
&nbsp;&nbsp;&nbsp;&nbsp;    i++;
} while (i < 0);

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Section 4. Chapter 2

Introduction to C++ | Mobile-Friendly

Do/While Loop

Monica, Joey, and Janice put their money in the bank at 10% annual income. Fill the gaps in the program that accepts a user’s input the money of each person and calculate the annual income by multiplying the sum of money by 0.1 (10%).