It is often useful to use one data type as another. To do this, you must do a type conversion.
For example, the string "2" needs to be converted to an int before being used in calculations.
Likewise, the int 2 needs to be converted to a string before you perform string concatenation (which we will do often when printing.)
The commands to do this are the same as the type's abbeviations:
str()
int()
float()
bool()
For example:
print("Hello, I am " + str(age) + " years old!")
Note: If the conversion is impossible, like int("hello world") you will get a ValueError.