declaration and re-declaration of the variable

"""
Created on Thu Aug 29 16:29:56 2019
@author: anil durgam
date:29-08-2019
"""
# Declare a variable and initialize it
f = 0
print(f)
# re-declaring the variable works
f = 'guru99'
print(f)

output:
0
guru99





example 3:


"""
Created on Thu Aug 29 16:29:56 2019
@author: anil durgam
date:29-08-2019
"""
# Declare a variable and initialize it
f = 101
print(f)
# Global vs. local variables in functions
def someFunction():
# global f
    f = 'I am learning Python'
    print(f)
someFunction()
print(f)

output:
101
I am learning Python

101