print(10, 13, 98, 123, end=":::")
print(10, 13, 98, 123, end=":::")
print(10, 13, 98, 123, end=":::")
print(10, 13, 98, 123)
x= abs(-12)
print(x)
# calculate rectangle area
# width=14
# length=5
# area = width *  length
# print("The rectangle area with width=%d and length=%d is %d." %(width, length, area))
# print(f"The rectangle area with width={width} and length={length} is {area}.")
# print(f"The rectangle area with width={width} and length={length} is {area:.1f}.")
# a = 2020
# b = 2000
# c = a-b
# print(f"problem 01: {a} - {b} = {c}")
# print(f"problem 02: {a} - {b} = {c}")
# print(f"problem 03: I don' know.")
# print(f"6 \u00F7 5 = {6/5}")
# name = input("Enter your name: ")
# age = int(input("Enter your age: "))
# # %d is a second placeholder which holds an integer
# # %s is a first placeholder which holds a string
# print("%s is %d years old." %(name,age))
# print("after 5 years you will be %d years old." %(age+5))

