邏輯判斷與邏輯語(yǔ)句

對(duì)于─件事情正確與否（真假的判斷) √ X 根據(jù)判斷的結(jié)果做不同的事情，就是我們的邏輯業(yè)務(wù) 對(duì)于條件滿足的判斷語(yǔ)句，就是條件語(yǔ)句 一個(gè)邏輯語(yǔ)句是由條件語(yǔ)句和業(yè)務(wù)語(yǔ)句組合而成

if語(yǔ)句功能

判斷一個(gè)命題的真實(shí)性，如果命題為真( True )則執(zhí)行if的邏輯語(yǔ)句

if語(yǔ)句用法

用法:

if bool_result: # 語(yǔ)法塊do # 業(yè)務(wù)代碼塊注意縮進(jìn)

參數(shù)︰

bool_result: 判斷結(jié)果的真假，布爾類型 do: 如果bool_result為True時(shí)執(zhí)行任意python代碼

返回值: if屬于關(guān)鍵字，沒(méi)有返回值

>>> insane_status = ’hunger>>> if insane_status == ’hunger’:print( ’xiaomu invites Insane to dinner’ )xiaomu invites Insane to dinner

實(shí)戰(zhàn)

# coding:utf-8info = ’my name is insane’info_list = info.split()print(info_list)if info_list[0] == ’insane’: print(1) info_list[0] = ’loafer’if info_list[1] == ’insane’: print(2) info_list[1] = ’loafer’if info_list[2] == ’insane’: print(3) info_list[2] = ’loafer’if info_list[-1] == ’insane’: print(4) info_list[-1] = ’loafer’print(info_list)info = ’ ’.join(info_list)print(info)info = ’my name is insane, i am a pythoner, i love python’info_list = info.split()if info_list[0] in [’python’, ’i’]: info_list[0] = ’*’if info_list[1] == ’python’ or info_list[1] == ’i’: info_list[1] = ’*’if info_list[2] == ’python’ or info_list[2] == ’i’: info_list[2] = ’*’if info_list[3] == ’python’ or info_list[3] == ’i’: info_list[3] = ’*’if info_list[4] == ’python’ or info_list[4] == ’i’: info_list[4] = ’*’if info_list[5] == ’python’ or info_list[5] == ’i’: info_list[5] = ’*’if info_list[6] == ’python’ or info_list[6] == ’i’: info_list[6] = ’*’if info_list[7] == ’python’ or info_list[7] == ’i’: info_list[7] = ’*’if info_list[8] == ’python’ or info_list[8] == ’i’: info_list[8] = ’*’if info_list[9] == ’python’ or info_list[9] == ’i’: info_list[9] = ’*’if info_list[-1] in [’python’, ’i’]: info_list[-1] = ’*’print(info_list)info = ’ ’.join(info_list)print(info)info = ’my name is insane’print(len(info))if len(info) > 10 and len(info) != 15: print(info.replace(’insane’, ’loafer’))if len(info) > 10 and len(info) != 17: print(info.replace(’name’, ’iop’))print(’finish’)

[’my’, ’name’, ’is’, ’insane’]4[’my’, ’name’, ’is’, ’loafer’]my name is loafer[’my’, ’name’, ’is’, ’insane,’, ’*’, ’am’, ’a’, ’pythoner,’, ’*’, ’love’, ’*’]my name is insane, * am a pythoner, * love *17my name is loaferfinishProcess finished with exit code 0

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