The main problem here is that you are calling functions as they were variables

Here is your code with the functions being called correctly:

```
import math
print('input your height and weight to find BMI.')
num_a = int(input("feet=="))
num_b = int(input("inches=="))
num_c = int(input("weight(lbs)=="))
def weight():
return int(num_c) * 2.2
def height():
return (int(num_a)) * 12 + int(num_b)
def height_meters():
return (int(height())) * 0.0254
def height_meters_sq():
return math.sqrt(int(height_meters()))
def bmi():
return (int(weight())) / int(height_meters_sq())
print("Your BMI is..")
print(bmi())
```

The result:

```
input your height and weight to find BMI.
feet==10
inches==5
weight(lbs)==10
Your BMI is..
22.0
```

The other problem in your code, is that your functions where not returning the values. In python, the default return value from a function is None (null), so if you don’t return the value, when you print the bmi(), it will simply print `None`

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solved How do i print out number variables in python 3? [closed]