# ChapterArithmetic/powers2.py 
"""
Powers of 2 till n. Enter n? 4
2** 0 = 1
2** 1 = 2
2** 2 = 4
2** 3 = 8
"""
def main():
    n = int(input("Powers of 2 till n. Enter n? "))
    for i in range(n):
        print("2**", i,"=", 2 ** i)

main()