C++ While Loop

by Online Tutorials Library July 14, 2022

C++ While loop

In C++, while loop is used to iterate a part of the program several times. If the number of iteration is not fixed, it is recommended to use while loop than for loop.

Flowchart:

C++ While Loop Example

Let’s see a simple example of while loop to print table of 1.

 #include <iostream> using namespace std; int main() {         int i=1;              while(i<=10)         {                 cout<<i <<“n”;               i++;           }          } 

Output:

1 2 3 4 5 6 7 8 9 10

C++ Nested While Loop Example

In C++, we can use while loop inside another while loop, it is known as nested while loop. The nested while loop is executed fully when outer loop is executed once.

Let’s see a simple example of nested while loop in C++ programming language.

 #include <iostream> using namespace std; int main () {         int i=1;               while(i<=3)              {                 int j = 1;                 while (j <= 3)   {                 cout<<i<<” “<<j<<“n”;                 j++;           }               i++;         }     }   

Output:

1 1 1 2 1 3 2 1 2 2  2 3 3 1 3 2 3 3

C++ Infinitive While Loop Example:

We can also create infinite while loop by passing true as the test condition.

 #include <iostream> using namespace std; int main () {         while(true)           {                     cout<<“Infinitive While Loop”;             }       }   

Output:

Infinitive While Loop  Infinitive While Loop Infinitive While Loop Infinitive While Loop Infinitive While Loop ctrl+c

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