慚愧,從1加到100的程序沒算對(duì),大家?guī)兔�看�?/a>

firebat0

rs=0
for i in range(1,100):
    rs+=i
print rs

firebat0

算出來是4950

firebat0

……
郁悶
原來range（1，100）是從1到99
改為range（1，101）就好了

eookoo

對(duì)ah...
for i in range( 1 , 100 ) ->  i = 1  and i < 100

gucuiwen

sum(range(1,101))

jacksun5

reduce(lambda x,y+y,range(1,101))

phpbird

沒想到還有五樓這種寫法。
效率好像還不錯(cuò)，贊。

njmarshal

Help on built-in function reduce in module __builtin__:

reduce(...)
    reduce(function, sequence[, initial]) -> value
   
    Apply a function of two arguments cumulatively to the items of a sequence,
    from left to right, so as to reduce the sequence to a single value.
    For example, reduce(lambda x, y: x+y, [1, 2, 3, 4, 5]) calculates
    ((((1+2)+3)+4)+5).  If initial is present, it is placed before the items
    of the sequence in the calculation, and serves as a default when the
    sequence is empty.

dragbook

看看