Cov txheej txheem:
Video: Dab tsi yog qhov hloov pauv hauv JavaScript?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Cov hloov nqe lus executes ib block ntawm code nyob ntawm qhov sib txawv rooj plaub . Cov hloov nqe lus yog ib feem ntawm JavaScript cov "Conditional" Cov Lus Qhia, uas yog siv los ua qhov sib txawv raws li cov xwm txheej sib txawv. Cov hloov nqe lus feem ntau yog siv ua ke nrog kev so lossis ib lo lus tseem ceeb (los yog ob qho tib si).
Ib yam li ntawd, dab tsi yog rooj plaub hauv daim ntawv hloov pauv?
Kev tshaj tawm. A hloov nqe lus tso cai rau qhov sib txawv los ntsuas qhov sib npaug ntawm cov npe ntawm cov txiaj ntsig. Txhua tus nqi hu ua a cas , thiab qhov hloov pauv hloov tau raug kuaj xyuas rau txhua tus hloov rooj.
Qhov thib ob, peb puas tuaj yeem siv cov lus qhia hauv kev hloov pauv? Hauv qab no yog qee qhov tseeb nthuav txog hloov nqe lus . 1) Cov siv tau hauv hloov yuav tsum yog hom integral (int, char thiab enum). Lwm hom kev qhia tsis pub.
Raws li txoj cai, peb puas tuaj yeem siv txoj hlua hloov pauv hauv JavaScript?
JavaScript muaj ob leeg. Hauv ib hloov nqe lus , kev sib piv nrog cov rooj plaub yog via ===, and a txoj hlua piv txwv tsis yog === rau a txoj hlua keeb kwm.
Koj sau li cas hloov rooj plaub?
Cov cai rau kev hloov pauv lus:
- Ib qho kev qhia yuav tsum ua tiav rau qhov tshwm sim.
- Case labels yuav tsum tsis tu ncua thiab tshwj xeeb.
- Cov ntawv cim yuav tsum xaus nrog lub plab (:).
- Ib lo lus tseem ceeb so yuav tsum muaj nyob rau hauv txhua rooj plaub.
- Muaj peev xwm tsuas muaj ib daim ntawv lo.
- Peb tuaj yeem tsim ntau cov lus qhia hloov.
Pom zoo:
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