PROGRAMMING:n rows triangle (1)
develop a `n` rows trianglar pattern similar to the followings (if inputing 4 for `n`).
```
*
**
***
****
```
###Input format:
Input a integer for `n`.
###Output format:
output the response pattern. No extra blank in the pattern.
###Input example:
```in
five
```
###Output example:
```out
*
**
***
****
```
answer：If there is no answer, please comment
```
*
**
***
****
```
###Input format:
Input a integer for `n`.
###Output format:
output the response pattern. No extra blank in the pattern.
###Input example:
```in
five
```
###Output example:
```out
*
**
***
****
```
answer：If there is no answer, please comment