0:00:00.320,0:00:03.740
Komputerlarning yaxshi jihatlaridan biri bu buyruqlarni qayta bajarishi.
0:00:03.740,0:00:08.170
Inson sifatida, agar siz bir xil narsani ko‘p marta qilishingiz kerak bo‘lsa,
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haqiqatda zerikib ketasiz.
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Ammo komputer bir xil narsani million yoki hattoki[br]milliard marta ham qila oladi,
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va zerikmasdan yaxshi holatda bu ishni oxirigacha yetkazib qo‘ya oladi.
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Shunday qilib, misol uchun, agar men Facebookdagi barcha foydalanuvchini
0:00:17.430,0:00:20.960
email jo‘natib tug‘ilgan kuni bilan tabriklashni xohlasam,
0:00:20.960,0:00:24.850
bu emaillarni barchaga yozib jo‘natish uchun
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menda bir asrdan ko‘p vaqt ketadi.
0:00:25.269,0:00:28.760
Lekin bir necha qator kod bilan, men Facebookdagi [br]barchaga tug‘ilgan
0:00:28.760,0:00:32.229
kuni bilan tabriklab email yuboradigan[br]tizim yarata olaman.
0:00:32.229,0:00:34.000
Mana loop - sikllar nima va nima uchun ular ahamiyatli.
0:00:34.500,0:00:37.180
Ular kompyuterlar juda yaxshi bajara oladigan narsalardan biri.
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Bu misolda, sizning maqsadingiz qushni cho‘chqaga yetishi
0:00:40.550,0:00:44.940
uchun harakatlantirish. Biz buni juda ham oson bajarish uchun
0:00:44.940,0:00:49.210
"repeat" blokidan foydalana olish imkoniyatiga egamiz. Siz buni
0:00:49.210,0:00:52.219
har safar qushni cho‘chqaga qaratib bir qadam yaqinlashtirish uchun
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komputerga besh marta "move forward" buyug‘ini berish orqali ham bajarishingiz mumkin.
0:00:57.079,0:01:00.590
Yoki siz komputerga shunchaki bir marta oldinga harakatlanishini aytib,
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va keyin unga bu ishni 5 marta qaytarishni aytishingiz mumkin[br]va u xuddi shunday qiladi.
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Shunday qilib, buni qilish uchun siz "move forward" buyrug‘ini olib,
0:01:08.280,0:01:11.729
uni "repeat" bloki ichiga joylaysiz.
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Bu yerga bosib, qancha qadam oldinlashini xohlashingizni
0:01:16.200,0:01:19.970
aytish uchun blokni necha marta qaytarishini ayta olasiz.[br]Endi yana bir narsa
0:01:19.970,0:01:23.540
siz repaat bloki ichiga [br]istalgancha ko‘p buyruqlarni qo‘ya olasiz.
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Masalan, bu yerda siz unga besh marta
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oldinga harakatlanish va chapga burilishni aytayapsiz.[br]Xo‘sh...
0:01:30.970,0:01:31.220
Ajoyib! Zavq oling :-)