python中的for i in range怎么用 python中的for i in range怎么用

python\u4e2d\u7684for i in range\u600e\u4e48\u7528

\u5148\u8981\u77e5\u9053rang\u7684\u4f5c\u7528\u3002range(2,4),\u5176\u4ee3\u8868[2,3,4]
\u5176\u5b9ePython \u7684 for i in range (m,n)
\u76f8\u5f53\u4e8e C++/Java/C# \u91cc\u9762\u7684 for (int i = m; i < n; i++)
\u6bd4\u5982range(1,10)

Python\uff08\u8ba1\u7b97\u673a\u7a0b\u5e8f\u8bbe\u8ba1\u8bed\u8a00\uff09
Python\uff08\u82f1\u56fd\u53d1\u97f3\uff1a/ˈpaɪ\u03b8ən/ \u7f8e\u56fd\u53d1\u97f3\uff1a/ˈpaɪ\u03b8\u0251ːn/\uff09, \u662f\u4e00\u79cd\u9762\u5411\u5bf9\u8c61\u7684\u89e3\u91ca\u578b\u8ba1\u7b97\u673a\u7a0b\u5e8f\u8bbe\u8ba1\u8bed\u8a00\uff0c\u7531\u8377\u5170\u4ebaGuido van Rossum\u4e8e1989\u5e74\u53d1\u660e\uff0c\u7b2c\u4e00\u4e2a\u516c\u5f00\u53d1\u884c\u7248\u53d1\u884c\u4e8e1991\u5e74\u3002
Python\u662f\u7eaf\u7cb9\u7684\u81ea\u7531\u8f6f\u4ef6\uff0c \u6e90\u4ee3\u7801\u548c\u89e3\u91ca\u5668CPython\u9075\u5faa GPL(GNU General Public License)\u534f\u8bae \u3002Python\u8bed\u6cd5\u7b80\u6d01\u6e05\u6670\uff0c\u7279\u8272\u4e4b\u4e00\u662f\u5f3a\u5236\u7528\u7a7a\u767d\u7b26(white space)\u4f5c\u4e3a\u8bed\u53e5\u7f29\u8fdb\u3002
Python\u5177\u6709\u4e30\u5bcc\u548c\u5f3a\u5927\u7684\u5e93\u3002\u5b83\u5e38\u88ab\u6635\u79f0\u4e3a\u80f6\u6c34\u8bed\u8a00\uff0c\u80fd\u591f\u628a\u7528\u5176\u4ed6\u8bed\u8a00\u5236\u4f5c\u7684\u5404\u79cd\u6a21\u5757\uff08\u5c24\u5176\u662fC/C++\uff09\u5f88\u8f7b\u677e\u5730\u8054\u7ed3\u5728\u4e00\u8d77\u3002\u5e38\u89c1\u7684\u4e00\u79cd\u5e94\u7528\u60c5\u5f62\u662f\uff0c\u4f7f\u7528Python\u5feb\u901f\u751f\u6210\u7a0b\u5e8f\u7684\u539f\u578b\uff08\u6709\u65f6\u751a\u81f3\u662f\u7a0b\u5e8f\u7684\u6700\u7ec8\u754c\u9762\uff09\uff0c\u7136\u540e\u5bf9\u5176\u4e2d \u6709\u7279\u522b\u8981\u6c42\u7684\u90e8\u5206\uff0c\u7528\u66f4\u5408\u9002\u7684\u8bed\u8a00\u6539\u5199\uff0c\u6bd4\u59823D\u6e38\u620f\u4e2d\u7684\u56fe\u5f62\u6e32\u67d3\u6a21\u5757\uff0c\u6027\u80fd\u8981\u6c42\u7279\u522b\u9ad8\uff0c\u5c31\u53ef\u4ee5\u7528C/C++\u91cd\u5199\uff0c\u800c\u540e\u5c01\u88c5\u4e3aPython\u53ef\u4ee5\u8c03\u7528\u7684\u6269\u5c55\u7c7b\u5e93\u3002\u9700\u8981\u6ce8\u610f\u7684\u662f\u5728\u60a8\u4f7f\u7528\u6269\u5c55\u7c7b\u5e93\u65f6\u53ef\u80fd\u9700\u8981\u8003\u8651\u5e73\u53f0\u95ee\u9898\uff0c\u67d0\u4e9b\u53ef\u80fd\u4e0d\u63d0\u4f9b\u8de8\u5e73\u53f0\u7684\u5b9e\u73b0\u3002
7\u670820\u65e5\uff0cIEEE\u53d1\u5e032017\u5e74\u7f16\u7a0b\u8bed\u8a00\u6392\u884c\u699c\uff1aPython\u9ad8\u5c45\u9996\u4f4d \u3002

for i in range\uff08a,b,c\uff09
a\u4e3a\u5faa\u73af\u5f00\u59cb\u7684\u6570\u5b57(\u53ef\u4e0d\u586b\uff0c\u9ed8\u8ba4\u4e3a0)\uff0cb\u4e3a\u5faa\u73af\u7ed3\u675f\u7684\u540e\u4e00\u4f4d\uff08c\u4e3a\u6b63\u6570\u65f6\uff09\u7684\u6570\u5b57\uff0cc\u4e3a\u6b65\u8fdb\u7684\u8ddd\u79bb\u548c\u65b9\u5411\uff0c\u9ed8\u8ba4\u4e3a1\u3002
for i in range(1, 101\uff0c1):
print i
range(1, 101)\u8868\u793a\u4ece1\u5f00\u59cb\uff0c\u5230101\u4e3a\u6b62\uff08\u4e0d\u5305\u62ec101\uff09\uff0c\u53d6\u5176\u4e2d\u6240\u6709\u7684\u6574\u6570\u3002
for i in range(1, 101)\u5c31\u662f\u8bf4\uff0c\u628a\u8fd9\u4e9b\u6570\uff0c\u4f9d\u6b21\u8d4b\u503c\u7ed9\u53d8\u91cfi\u3002
\u76f8\u5f53\u4e8e\u4e00\u4e2a\u4e00\u4e2a\u5faa\u73af\u8fc7\u53bb\uff0c\u7b2c\u4e00\u6b21i = 1\uff0c\u7b2c\u4e8c\u6b21i = 2\uff0c\u2026\u2026\uff0c\u76f4\u5230i = 100\u3002\u5f53i = 101\u65f6\u8df3\u51fa\u5faa\u73af\u3002

\u6269\u5c55\u8d44\u6599
for i in range\u5b9e\u64cd\uff1a
fori in range(3):
print(i)
>>>0,1,2
for i in range(10,0,-1)\uff1a
print(i)
>>>10\uff0c9\uff0c8\uff0c7\uff0c6\uff0c5\uff0c4\uff0c3\uff0c2\uff0c1
\u53c2\u8003\u8d44\u6599\uff1a\u767e\u5ea6\u767e\u79d1 - range

for i in range(1,10):
  print i,
  
##结果为
1 2 3 4 5 6 7 8 9

#range(1,10)的意思为从1开始，到10结束(但不包含10)

以上就是用法

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