ban luyen

Swift

lo trinh thuc hanh de hoc Swift tu con so 0

Tiếng Việt

dinh nghia truoc

Swift la gi

Swift dung de viet chi dan chinh xac. O day ban hoc theo lo trinh thuc hanh de hoc Swift tu con so 0. Hay bat dau voi mot mo hinh: dau vao qua cac buoc roi thanh dau ra.

thong tin chay toi thieutep main.swiftchay swift main.swiftthoi quen hoc mot phan nho cua Swift, go vi du toi thieu roi chay
chuong trinh

tap hop lenh duoc chay theo thu tu.

gia tri va bien

gia tri la du lieu. bien la ten de giu du lieu.

ham

mot viec nho co ten, nhan dau vao va tao ket qua.

moi truong

Swift toolchain chay code trong main.swift.

doan code dau tien

dau ra chuong trinh

entry point output syntax print
print(42)
dau ra 42

pha he ngon ngu

cay pha he Swift

xem Swift den tu dau, gan voi ngon ngu nao, va nen hoc gi tiep.

goc
Objective-CRustHaskell
hien taiSwiftho ngon ngu lap trinh he thong
ho ngon nguho ngon ngu lap trinh he thong
phu hop cho

phu hop cho lo trinh thuc hanh de hoc Swift tu con so 0

tu con so 0

1doc mot quy tac2doan dau ra3go bang tri nho4chay kiem tra5lap lai voi mot thay doi

Ngan hang cau hoi

Tim truoc khi luyen

Chon giai doan hoac tim trong ngan hang cua ngon ngu nay roi mo bai tap.

18 ket qua
Q 1Lua chonGiai doan 1 dinh nghia

Swift cau 1

Swift cau 1. Chon mo ta phu hop nhat voi in mot gia tri.

Q 2Lua chonGiai doan 1 dinh nghia

Swift cau 2

Swift cau 2. Chon mo ta phu hop nhat voi dat ten cho gia tri.

Q 3Lua chonGiai doan 1 dinh nghia

Swift cau 3

Swift cau 3. Chon mo ta phu hop nhat voi ham tai su dung.

Q 4Lua chonGiai doan 1 dinh nghia

Swift cau 4

Swift cau 4. Chon mo ta phu hop nhat voi tap hop co ban.

Q 5Lua chonGiai doan 1 dinh nghia

Swift cau 5

Swift cau 5. Chon mo ta phu hop nhat voi in mot gia tri.

Q 6Lua chonGiai doan 1 dinh nghia

Swift cau 6

Swift cau 6. Chon mo ta phu hop nhat voi dat ten cho gia tri.

Q 7Lua chonGiai doan 1 dinh nghia

Swift cau 7

Swift cau 7. Chon mo ta phu hop nhat voi ham tai su dung.

Q 8Lua chonGiai doan 1 dinh nghia

Swift cau 8

Swift cau 8. Chon mo ta phu hop nhat voi tap hop co ban.

Q 9Lua chonGiai doan 1 dinh nghia

Swift cau 9

Swift cau 9. Chon mo ta phu hop nhat voi in mot gia tri.

Q 10Lua chonGiai doan 1 dinh nghia

Swift cau 10

Swift cau 10. Chon mo ta phu hop nhat voi dat ten cho gia tri.

Q 11Lua chonGiai doan 1 dinh nghia

Swift cau 11

Swift cau 11. Chon mo ta phu hop nhat voi ham tai su dung.

Q 12Lua chonGiai doan 1 dinh nghia

Swift cau 12

Swift cau 12. Chon mo ta phu hop nhat voi tap hop co ban.

Q 13Lua chonGiai doan 1 dinh nghia

Swift cau 13

Swift cau 13. Chon mo ta phu hop nhat voi in mot gia tri.

Q 14Lua chonGiai doan 1 dinh nghia

Swift cau 14

Swift cau 14. Chon mo ta phu hop nhat voi dat ten cho gia tri.

Q 15Lua chonGiai doan 1 dinh nghia

Swift cau 15

Swift cau 15. Chon mo ta phu hop nhat voi ham tai su dung.

Q 16Lua chonGiai doan 1 dinh nghia

Swift cau 16

Swift cau 16. Chon mo ta phu hop nhat voi tap hop co ban.

Q 17Lua chonGiai doan 1 dinh nghia

Swift cau 17

Swift cau 17. Chon mo ta phu hop nhat voi in mot gia tri.

Q 18Lua chonGiai doan 1 dinh nghia

Swift cau 18

Swift cau 18. Chon mo ta phu hop nhat voi dat ten cho gia tri.

trac nghiem

Swift cau 1

Q 1Lua chonmoi

Swift cau 1. Chon mo ta phu hop nhat voi in mot gia tri.

print(42)

tham khao

mau cho main.swift

Swift toolchainswift main.swift
nho laidoc mot y nho roi viet lai ma khong nhin
lan theo codeghi gia tri bien tung dong truoc khi chay
tu goit copy hon go nhieu hon va sua mot loi nho

entry point output syntax print

dau ra chuong trinh

print(42)
  • Run the smallest file first
  • Print one known value
  • Check the output before adding more code

variables assignment types let

gia tri va ten

let total = 42
print(total)
  • Give values readable names
  • Keep one idea per line while learning
  • Trace the value before changing it

function collection Array

ham va tap hop

func add(_ a: Int, _ b: Int) -> Int {
  return a + b
}

let scores = [40, 2]
print(scores.count)
  • Keep functions small
  • Return useful values
  • Use the common collection before reaching for frameworks