how to pass string without empty string in ionic 4 code example

Example 1: how to insert a variable into a string without breaking up the string in python

name = "Dan"
age = 21
#you need to have that "f" before the string
name_and_age = f"My name is {name}, and I am {age} years old."
print(name_and_age)

Example 2: how to add string with number in python

>>> print 'red' + str(3)
red3
>>>