在 Python 中,我的函数没有 return 值
In Python, my functions don't return values
当我 运行 程序时,它没有 return 我输入的值是 num1
和 num2
。
有人可以告诉我我做错了什么吗?
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('Lists of operations: ')
print('1. add')
print('2. subtract')
print('3. multiply')
print('4. divide')
operations = int(input('Select an operation (1/2/3/4): '))
num1 = float(input('Enter a number: '))
num2 = float(input('Enter a number: '))
# Functions aren't returning values
if '1' == operations:
print(num1,'+',num2,'equals'+ add(num1, num2))
# Functions aren't returning values
elif '2' == operations:
print(num1,'-',num2,'equals', subtract(num1, num2))
# Functions aren't returning values
elif '3' == operations:
print(num1,'*',num2,'equals', multiply(num1, num2))
# Functions aren't returning values
elif '4' == operations:
print(num1,'/',num2,'equals', divide(num1, num2))
您正在将整数与字符串进行比较:
if '1' == operations:
使用1
代替'1'
,其他号码也一样:
if 1 == operations:
当我 运行 程序时,它没有 return 我输入的值是 num1
和 num2
。
有人可以告诉我我做错了什么吗?
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('Lists of operations: ')
print('1. add')
print('2. subtract')
print('3. multiply')
print('4. divide')
operations = int(input('Select an operation (1/2/3/4): '))
num1 = float(input('Enter a number: '))
num2 = float(input('Enter a number: '))
# Functions aren't returning values
if '1' == operations:
print(num1,'+',num2,'equals'+ add(num1, num2))
# Functions aren't returning values
elif '2' == operations:
print(num1,'-',num2,'equals', subtract(num1, num2))
# Functions aren't returning values
elif '3' == operations:
print(num1,'*',num2,'equals', multiply(num1, num2))
# Functions aren't returning values
elif '4' == operations:
print(num1,'/',num2,'equals', divide(num1, num2))
您正在将整数与字符串进行比较:
if '1' == operations:
使用1
代替'1'
,其他号码也一样:
if 1 == operations: