Numbers

link - docs.python.org/3/library/numeric.html 
link - docs.python.org/3/library/math.html#module-math 
link - docs.python.org/3/library/cmath.html#module-cmath 

1.0 is a float
anything with a decimal point is considered a float

Modules

math -
cmath

num1 = 5 
num2 = 10 
sum = num1 + num2 
print(sum) 

any time there is at least one float in an expression, the result is float