Comand: if – else vs else if

Odatda if else komandasi ternary komandasini o’rnida bemalol kela oladi. Farqi ternaryda branchlar 2ta bo’lsagina, masalani ishlasa bo’ladi, if komandasi 2 va undan ortiq execution partlar mavjud bo’lgan masalalarni bemalol ishlay oladi.



if komandasida beriladigan ifoda tog’ri bo’lsagina uni chop etadi.

   if( expression )
{
statement1
}
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if statementda yo’l qo’yiladigan kichik xatolar

  • if (expression) shu ifodadan so’ng ; mana bu belgini qo’yish xato hisoblanib, ifoda shu qatorda tugadi degan komadani berib yuboradi.
  • if ning (expression) qismida = bu belgini bitta qo’yish xato, chunki teng bir o’zi kelganda o’zgaruvchi uchun yangi qiymat o’zlashishida ishlatiladi, ya’ni == shu belgini qo’yish to’g’ri bo’ladi.
    • yana bir kichik qoida bor, agarda if, elseda assertion, ya’ni buyruq bitta bo’lsa, {} bularni qo’yish shart emas.



if-else

If else bn ko’p hollarda qo’llanadigan qo’shimcha komanda bu else hisoblanib, if dagi ifoda xato bo’lganda ikkinchi assertion chiqar degan buyruq berishda ishlatiladi.

if(expression) 
{
statement1
}
else 
{
statement2
}
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if else vs else if

Bu ikki komanda aslida bir xil bo’lib, else komandasini ichida bemalol xohlagancha, if else komandasini o’zida foydalansa bo’ladi. Shuni hisobiga aslida if else komandasi else if deb ko’rinadi, ya’ni:

#embody <iostream>

 utilizing namespace std;

 int major()
{

int baho;

cin >> baho;

if(baho >= 90)

{

cout << "A" << endl;

}


else


{

if (baho >= 80)

{

cout <<< "B" <<<< endl;

}


else


{

if (baho > 70)

{

cout << "C" << endl;

}

else

{

if (baho > 60)

{

cout << "D" <<<<endl;

}

else


{


cout << "F" << endl;

}

}

}

}

return 0;

42}
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1 #embody <iostream>

3 utilizing namespace std;


5 int major()
{


int baho;


cin >> baho;

10

if (baho >= 90)

cout << "A" << endl;

else if(baho >= 80)

cout << "B" << endl; 

else if(baho >= 70)

cout << "C" << endl;

else if(baho >= 60)

cout << "D" << endl;

else

cout << "F" << endl;


return 0;
}
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