how to typecast string to number in python code example

Example 1: convert string to number python

#INTEGERS
# Use the class int() to turn a string into a integer
s = "120"
s = int(s)
print(s+1)
#121
#FLOATS
# Use the class float() to turn a string into a float
s="2.5"
s = float(s)
print(s*2)
#5.0

Example 2: convert string to number python

>>> x = "23"
>>> y = "20"
>>> z = int(x) - int(y)
>>> z
3