variable declaration in python

example 1:

print('3'+'5')
a='3'
b='5'
c=a+b
print(c)
print(type(c))

output:
35
35
<class 'str'>

example 1:

Favoritecolor="red"

favoritecolor="yellow"

print(Favoritecolor,"\n",favoritecolor)

output:
red
 yellow