利用for循環(huán)和while循環(huán)求n？

xStart=raw_input("please enter the int number:")

xInt= int(xStart)

count=0

while not xInt==count:

count +=1

print count #你輸入多少就從1顯示到這個(gè)數(shù)

還有就是求和：

xStart=raw_input("please enter the int number:")

xInt= int(xStart)

count= 0

sum= 0

while not xInt == count:

count += 1

sum += count

print sum

#這里顯示的sum是如果你要輸入數(shù)值5，則顯示sum=1+2+3+4+5的值．