Cov kab lus dab tsi muaj nyob hauv ib nqe lus yog tias?

Cov txheej txheem:

Cov kab lus dab tsi muaj nyob hauv ib nqe lus yog tias?
Cov kab lus dab tsi muaj nyob hauv ib nqe lus yog tias?

Video: Cov kab lus dab tsi muaj nyob hauv ib nqe lus yog tias?

Video: Cov kab lus dab tsi muaj nyob hauv ib nqe lus yog tias?
Video: Koj saib kuv tsis muaj nqis - Nkauj tawm tshiab 2021-22 2024, Hlis ntuj nqeg
Anonim

Order of condition:

  • IF.
  • Kev mob (hauv daim ntawv qhia IF)
  • THEN (hauv daim ntawv qhia IF)
  • ELSE (yeem)

Yuav ua li cas yog ib feem ntawm ib nqe lus?

Lawv muaj tsawg kawg ntawm ob ntu, 'if' thiab 'ces'. Txawm li cas los xij, kuj tseem muaj cov kev xaiv xws li 'lwm' thiab 'lwm yog' rau ntau dua yog cov nqe lus. … Yog li, yog cov lus tseem ceeb txhais tau tias: 'Yog tias muaj ib yam dab tsi tseeb, ces ua ib yam dab tsi, txwv tsis pub ua lwm yam. '

Peb hom yog dab tsi?

Muaj peb hom lus ntawm IF: IF-THEN, IF-THEN-ELSE, thiab IF-THEN-ELSIF. Daim ntawv yooj yim tshaj plaws ntawm IF nqe lus koom nrog kev qhia Boolean nrog cov kab lus sib txuas los ntawm cov lus tseem ceeb TAM SIM NO thiab TAG NRHO. Cov lus qhia ua ntu zus tsuas yog ua tiav yog tias cov lus hais rov qab TRUE.

Yuav ua li cas muaj pes tsawg tus hauv ib nqe lus yog tias?

Technically xwb 1 condition is rated in an if, what is ascually happen is 1 condition tau soj ntsuam thiab nws cov txiaj ntsig yog ntsuas nrog rau tom ntej thiab lwm yam… Tsis muaj txhais tau tias txwv rau qhov ntev ntawm qhov kev qhia boolean; tej zaum, koj yuav khiav mus rau qhov teeb meem nco ntawm qee lub sijhawm.

hom lus yog dab tsi?

Muaj peb hom lus ntawm IF: IF-Tom qab ntawd, IF-THEN-ELSE, thiab IF-THEN-ELSIF. Daim ntawv yooj yim tshaj plaws ntawm IF nqe lus koom nrog Boolean qhianrog cov kab lus ntawm cov lus uas tau muab los ntawm cov ntsiab lus TAM SIM NO thiab xaus IF. Cov lus qhia ua ntu zus tsuas yog ua tiav yog tias cov lus hais rov qab TRUE.

Pom zoo: