print("Hello world")
# variables
name = "Tazmim"
age = 20
avg = 40.80
# playing with strings

print("Tazmim Hossain")
name = "Tazmim Hossain"
# concatanation
print(name+" is a cool person")

# length
print(len(name))
# index
print(name.index("H"))
# upper and lower case
print(name.upper())
print(name.lower())
# index at nth position
print(name[10])
# replace
print(name.replace("Tazmim","Bondhon"))
















