42 lines
987 B
Markdown
42 lines
987 B
Markdown
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---
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title: do while loop
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---
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## Do While Loop
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The `do while loop` is almost the same as the while loop. The `do while loop` has the following form:
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```cpp
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do
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{
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// do something;
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} while(expression);
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```
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Note: Remember to use a semicolon ';' at the end of the condition.
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## Details about do-while loop
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The do-while loop is used whenever you are sure that a particular process(within the loop) has to be performed at least once. It has many advantages like not initialising the checking variable(eg- char addmore='Y') etc. The semicolon at the end of while is a must.
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Do something first and then test if we have to continue. The result is that the do block runs at least once. (Because the expression test comes afterward). Take a look at an example:
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```cpp
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#include <iostream>
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using namespace std;
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int main()
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{
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int counter, howmuch;
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cin >> howmuch;
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counter = 0;
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do
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{
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counter++;
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cout << counter << '\n';
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}
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while ( counter < howmuch);
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return 0;
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}
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```
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