Yaya kuke yin madauki na ɗan lokaci a cikin rubutun harsashi?
Daidaitawa. Anan ana kimanta umarnin Shell. Idan sakamakon da aka samu gaskiya ne, ana aiwatar da bayanan da aka bayar. Idan umarnin karya ne to babu wata sanarwa da za a aiwatar kuma shirin zai tsallake zuwa layi na gaba bayan bayanan da aka yi.
Shin madaukai harsashi script?
Duk lokacin da madauki ya aiwatar, ana saita ƙimar madaidaicin var zuwa kalma ta gaba a cikin jerin kalmomi, word1 zuwa wordN. Har sai an aiwatar da madauki gwargwadon lokutan da yanayin/umurni ya kimanta zuwa ƙarya. The madauki ya ƙare lokacin da yanayi/umurni ya zama gaskiya.
Shin yayin () shine madauki?
Domin yin yayin da madaukai suna duba yanayin bayan an aiwatar da toshe, tsarin sarrafawa kuma ana kiransa da madauki bayan gwaji. Kwatankwacin madauki yayin da ake yin madauki, wanda ke gwada yanayin kafin a aiwatar da lambar da ke cikin toshe, madaukin yi yayin da ake yin madauki. madauki na yanayin fita.
Menene misali madauki?
Madauki "Yayin da" shine ana amfani da shi don maimaita takamaiman shingen lambar sau da ba a sani ba, har sai an cika sharadi. Misali, idan muna so mu tambayi mai amfani lamba tsakanin 1 zuwa 10, ba mu san sau nawa mai amfani zai iya shigar da lamba mafi girma ba, don haka muna ci gaba da tambaya “yayin da lambar ba ta tsakanin 1 da 10”.
Menene bambanci tsakanin lokacin madauki da har sai madauki a cikin Shell?
Babban bambanci shine yayin da madaukai an tsara su don gudana yayin da yanayin ya cika sannan kuma ya ƙare da zarar yanayin ya dawo karya. A gefe guda, har sai an tsara madaukai don gudu yayin da yanayin ya dawo karya kuma ya ƙare kawai lokacin da yanayin ya dawo gaskiya.
Me yasa harsashi ba shi da wani aiki yayin madauki?
2 Amsoshi. bash (ko Posix shells gabaɗaya) ba su da madaidaicin madaidaicin madauki na gwajin gwaji (wanda akafi sani da madauki “yi-yayin”) saboda syntax zai yi yawa. Bayanin mahallin yana ba ka damar rubuta pre-test, bayan gwaji ko madaukai na gwaji, duk tare da syntax iri ɗaya.
Ta yaya zan gudanar da rubutun harsashi?
Matakai don rubutu da aiwatar da rubutun
- Bude m. Jeka ga adireshin inda kake son ƙirƙirar rubutun ka.
- Irƙiri fayil tare da. sh tsawo.
- Rubuta rubutun a cikin fayil din ta amfani da edita.
- Sanya rubutun aiwatarwa tare da umarni chmod + x .
- Gudanar da rubutun ta amfani da ./ .
Menene $? A cikin Unix?
Da $? m yana wakiltar matsayin fita na umarnin da ya gabata. Matsayin fita ƙimar lamba ce da kowane umarni ke dawowa bayan kammala ta. … Misali, wasu umarni suna bambanta tsakanin nau'ikan kurakurai kuma za su dawo da ƙimar fita daban-daban dangane da takamaiman nau'in gazawar.
Za mu iya rubuta yayin madauki don madauki?
Duk don madaukai ana iya rubuta su azaman lokacin madaukai, kuma akasin haka. Yi amfani da kowane madauki da ya fi dacewa da aikin da ke hannunka. Gabaɗaya, yakamata ku yi amfani da madauki lokacin da kuka san sau nawa madauki ya kamata ya gudana.
Menene bambanci tsakanin madauki da yin yayin madauki?
Wani lokaci madauki shine bayanin kula da gudana wanda ke ba da damar yin amfani da lambar akai-akai dangane da yanayin Boolean da aka bayar. Ana iya tunanin madauki a matsayin a maimaita idan sanarwa.
...
Ga bambancin tebur:
| yayin da | yi-yayin |
|---|---|
| yayin da madauki ke sarrafa madauki. | yi-alhali madauki yana fitar da madauki mai sarrafawa. |
A ina muke amfani da madauki?
Madauki "Don" shine ana amfani da shi don maimaita takamaiman toshe na lamba sanannen adadin lokuta. Misali, idan muna so mu duba darajar kowane ɗalibi a cikin aji, sai mu latsa daga 1 zuwa waccan lambar. Lokacin da ba a san adadin lokuta a gaban hannu ba, muna amfani da madauki "Yayin da".