Python, round()

 # round()
print(round(1.2))       # 1
print(round(1.2, 0))    # 1.0
print(round(1.2, 1))    # 1.2
print(round(1.2, 2))    # 1.2
print(round(1.7))       # 2
print(round(1.7, 0))    # 2.0
print(round(1.7, 1))    # 1.7
print(round(1.7, 2))    # 1.7
print(round(1.234567))       # 1
print(round(1.234567, 0))    # 1.0
print(round(1.234567, 1))    # 1.2
print(round(1.234567, 2))    # 1.23
print(round(1.234567, 3))    # 1.235