 GFG App
Open App Browser
Continue

# C++ Program To Print Number Without Reassigning

Here, we will build a C++ program to print the number pattern without Reassigning using 2 approaches i.e.

1. Using for loop
2. Using while loop

## 1. Using for loop

Input:

`n = 5`

Output:

```1
2 3
4 5 6
7 8 9 10
11 12 13 14 15  ```

The first for loop is used to iterate the number of rows and the second for loop is used to repeat the number of columns. Then print the number and increment the number to print the next number.

## C++

 `// C++ program to print number pattern ` `// without re assigning using for loop` `#include ` `using` `namespace` `std;`   `int` `main()` `{`   `    ``int` `rows, columns, number = 1, n = 5;` `  `  `    ``// first for loop is used to identify number of rows` `    ``for` `(rows = 0; rows <= n; rows++) {` `      `  `        ``// second for loop is used to identify number of` `        ``// columns and here the values will be changed` `        ``// according to the first for loop` `        ``for` `(columns = 0; columns < rows; columns++) {` `          `  `            ``// printing number pattern based on the number` `            ``// of columns` `            ``cout << number << ``" "``;` `          `  `            ``// incrementing number at each column to print` `            ``// the next number` `            ``number++;` `        ``}` `      `  `        ``// print the next line for each row` `        ``cout << ``"\n"``;` `    ``}` `    ``return` `0;` `}`

Output

```1
2 3
4 5 6
7 8 9 10
11 12 13 14 15 ```

## 2. Using while loop

Input:

`n = 5`

Output:

```1
2 3
4 5 6
7 8 9 10
11 12 13 14 15  ```

The while loops check the condition until the condition is false. If the condition is true then it enters into the loop and executes the statements.

## C++

 `// C++ program to print number without ` `// reassigning patterns using while loop` `#include ` `using` `namespace` `std;`   `int` `main()` `{` `    ``int` `rows = 1, columns = 0, n = 5;` `  `  `    ``// 1 value is assigned to the number` `    ``// helpful to print the number pattern` `    ``int` `number = 1;` `  `  `    ``// while loops check the condition and repeat` `    ``// the loop until the condition is false` `    ``while` `(rows <= n) {` `      `  `        ``while` `(columns <= rows - 1) {` `          `  `            ``// printing number to get required pattern` `            ``cout << number << ``" "``;` `          `  `            ``// incrementing columns value` `            ``columns++;` `          `  `            ``// incrementing number value to print the next` `            ``// number` `            ``number++;` `        ``}` `        ``columns = 0;` `      `  `        ``// incrementing rows value` `        ``rows++;` `        ``cout << endl;` `    ``}` `    ``return` `0;` `}`

Output

```1
2 3
4 5 6
7 8 9 10
11 12 13 14 15 ```

My Personal Notes arrow_drop_up