python programming basic code

The following are some basic Python programming code examples:

1. Calculator:

def add(x, y):
return x + y
def subtract(x, y):
return x - y
def multiply(x, y):
return x * y
def divide(x, y):
return x / y
print("选择操作：")
print("1.加法")
print("2.减法")
print("3.乘法")
print("4.除法")
choice = input("请输入操作对应的数字(1/2/3/4): ")
if choice == '1':
x = float(input("请输入第一个数字: "))
y = float(input("请输入第二个数字: "))
print("结果: ", add(x, y))
elif choice == '2':
x = float(input("请输入第一个数字: "))
y = float(input("请输入第二个数字: "))
print("结果: ", subtract(x, y))
elif choice == '3':
x = float(input("请输入第一个数字: "))
y = float(input("请输入第二个数字: "))
print("结果: ", multiply(x, y))
elif choice == '4':
x = float(input("请输入第一个数字: "))
y = float(input("请输入第二个数字: "))
print("结果: ", divide(x, y))
else:
print("输入错误，请输入正确的操作对应数字!")

2. Determine leap year:

def is_leap_year(year):
if (year % 4 == 0 and year % 100 != 0) or (year % 400 == 0):
return True
else:
return False
year = int(input("请输入一个年份: "))
if is_leap_year(year):
print("{}年是闰年。".format(year))
else:
print("{}年不是闰年。".format(year))

3. String reversal:

def reverse_string(s):
return s[::-1]
s = input("请输入一个字符串: ")
print("反转后的字符串: ", reverse_string(s))

4. Sum:

def sum_numbers(n):
return n * (n + 1) // 2
n = int(input("请输入一个正整数: "))
print("前 {} 个自然数的和为: {}。".format(n, sum_numbers(n)))

These sample codes cover basic Python Programming concepts such as variables, data types, operators, functions, conditional statements, etc. By learning these basic codes, you can gradually master Python programming. Python programming concepts such as variables, data types, operators, functions, conditional statements, etc. By learning these basic codes, you can gradually master Python programming.

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