Integers and floats are two different kinds of numerical data. An integer (more commonly called an int) is a number without a decimal point. A float is a floating-point number, which means it is a number that has a decimal place. Floats are used when you need to approximate real numbers.

```
a = 0 # Create a variable "a" of the datatype "int"
b = 0.0 # Create a variable "b" of the datatype "float"
def setup():
size(640, 360)
stroke(255)
frameRate(30)
def draw():
global a, b
background(0)
a = a + 1
b = b + 0.2
line(a, 0, a, height / 2)
line(b, height / 2, b, height)
if a > width:
a = 0
if b > width:
b = 0
```