最新回答 / 慕粉1858098231
因為是要列表元素平方和，所以必須要用一個‘容器’存儲每個元素平方和的累加值，所以需要‘sum’;其次關于為什么sum=0，python是解釋型語言，變量不需要聲明，但需要進行初始化。如果不進行初始化（即給sum賦值），系統只是為sum分配了一個內存空間，sum就如同一個只有軀殼，沒有靈魂的‘行尸走肉’，就沒有辦法和其他數據進行運算，即sum=sum+x*x,就會出現報錯。個人拙見，希望對你有用
2023-10-17
L = ['Alice','Chinese',92,'Math',75,'English',99]
print(L)
print(L)
2023-10-16
template='{} is short,you need {}'
result=template.format('Life','Python')
print(result)
result=template.format('Life','Python')
print(result)
2023-10-16
a1 = 'ABC'
b2 = '123'
c3 = 'xyz'
for a in a1:
for b in b2:
for c in c3:
print( a + b + c)
b2 = '123'
c3 = 'xyz'
for a in a1:
for b in b2:
for c in c3:
print( a + b + c)
2023-10-15
num = 0
sum = 0
while True:
if sum >1000:
break
if num%2 == 0 :
sum = sum + num
num = sum + 1
print(num)
num = 0
sum = 0
while num <=1000:
num = num +1
if num%2 == 1:
continue
sum= sum+num
print(sum)
sum = 0
while True:
if sum >1000:
break
if num%2 == 0 :
sum = sum + num
num = sum + 1
print(num)
num = 0
sum = 0
while num <=1000:
num = num +1
if num%2 == 1:
continue
sum= sum+num
print(sum)
2023-10-15
最新回答 / 慕九州9574257
縮進的問題，加上n+1要改為n+=1正確如下：num_list = []n = 1while n <= 100:? ? p = n * n? ? num_list.append(p)? ? n += 1s = sum(num_list)print(s)
2023-10-12
age = 20
if age > 18:
print('成年人')
elif age >=6:
print('青少年')
elif age >=3:
print('小孩子')
else:
print('嬰兒')
if age > 18:
print('成年人')
elif age >=6:
print('青少年')
elif age >=3:
print('小孩子')
else:
print('嬰兒')
2023-10-11
# Enter a code
age = 20
if age < 18 :
print('adult')
else :
print('teenager')
age = 20
if age < 18 :
print('adult')
else :
print('teenager')
2023-10-11
template = 'Life is short, {}'
a = 'you need Python'
result = template.format(a)
print(result)
template = 'Life is short, {a}'
b = 'you need Python'
result1 = template.format(a = b)
print(result1)
a = 'you need Python'
result = template.format(a)
print(result)
template = 'Life is short, {a}'
b = 'you need Python'
result1 = template.format(a = b)
print(result1)
2023-10-09
def my_func(x):
if isinstance(x, list):
return sum(x)
elif isinstance(x, tuple):
num = 1
for item in x:
num = item*num
return num
x = (12, 34, 56, 43, 65)
print(my_func(x))
if isinstance(x, list):
return sum(x)
elif isinstance(x, tuple):
num = 1
for item in x:
num = item*num
return num
x = (12, 34, 56, 43, 65)
print(my_func(x))
2023-10-03