>>> def area(r,pi=3.14159): return pi *r*r >>> area
时间: 2024-05-16 13:18:09 浏览: 84
This is a function definition for calculating the area of a circle with radius `r` and optional value of `pi`, which is set to 3.14159 by default. However, the function is incomplete and requires a colon at the end of the first line. Here is the corrected code:
```
def area(r, pi=3.14159):
return pi * r * r
```
Once you define this function, you can call it with a value for `r` like this:
```
print(area(5)) # Output: 78.53975
```
This will calculate the area of a circle with radius 5 using the default value of `pi`. You can also pass a different value for `pi` if you want, like this:
```
print(area(5, 3.14)) # Output: 78.5
```
This will calculate the area of a circle with radius 5 using a value of `pi` equal to 3.14.
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