<pre><code class="lang-cpp">int main(){
 int totalRows;
 cin&gt;&gt; totalRows;
 int currentRow=1;
 while(currentRow&lt;=totalRows) {
 int coloumn=1;
 int number=currentRow;
 while (coloumn &lt;=totalRows - currentRow) {
 cout &lt;&lt; " " ;
 coloumn = coloumn + 1;
 }

 while(coloumn&lt;=currentRow){
 cout&lt;&lt;number;
 number=number+1;
 coloumn = coloumn + 1;
 }
 cout&lt;&lt;endl; 
 currentRow=currentRow+1; 
 }

}
</code></pre>
func decl and def in c++

```cpp
int main(){
	int totalRows;
	cin>> totalRows;
	int currentRow=1;
	while(currentRow<=totalRows) {
		int coloumn=1;
					int number=currentRow;
 while (coloumn <=totalRows - currentRow) {
 cout << " " ;
				coloumn = coloumn + 1;
 }

			while(coloumn<=currentRow){
				cout<<number;
				number=number+1;
				coloumn = coloumn + 1;
			}
	cout<<endl;		
	currentRow=currentRow+1;		
 }

}
```

func decl and def in c++

Basic concept of lambda and closure