PROGRAMMING:Finding the power of 2
###Input example:
```in
zero point five
```
###Output example:
```out
pow(2,0.50)=1.41
```
answer：If there is no answer, please comment
```in
zero point five
```
###Output example:
```out
pow(2,0.50)=1.41
```
answer：If there is no answer, please comment
