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asilbek ibragimov
asilbek ibragimov

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32.Data Types

32. Data Types (Nullable)
a) C# da Nullable turlari nima uchun ishlatiladi?
b) Quyidagi kodning natijasi nima bo'ladi?

int? z = null;
if(z.HasValue)
{
    Console-WriteLine(z.Value):
}
else
{
    Console WriteLine("z is null");
}
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Javoblari:
a) C# dasturlash tilida Nullable Types — bu qiymat tiplari (masalan, int, bool, double kabi) uchun null qiymatni qabul qilish imkonini beruvchi tipdir. Oddiy qiymat tiplari odatda null qiymatga ega bo'la olmaydi, lekin Nullable Types yordamida bunday imkoniyatni yaratish mumkin.

Nullable turlari odatda ma'lumotlar bazasi, foydalanuvchi interfeysi yoki boshqa ma'lumot manbalarida null qiymatni ifodalash zarur bo'lgan vaziyatlarda ishlatiladi.

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