c++ Lecture 6 In Urdu

  Now start section 2

                

Increment and decrement operators

increment
increment use karty hai 1 add karny k lay and ++ se represent hota hai  ham es ko variable se pehly and bad me laga sakty hai
 a++
++a
a+1 = a++
increment have 2 types
prefix
prefix me pehly 1 add ho ga variable me per variable me use ho ga
 ++a
 int h,d a, sum;
h=1;
 d=1;
a=3;
sum=h+d+(++a)
cout<<sum;

output
6
es me pehhly a me 1 add ho jay ga per a k apni value 4 ho jai ge then h+d k sat add ho ga

postfix
a++
es me pehly apni value aye ga then 1 add ho ga

sum=h+d+(a++)
to es ka result 5 aye ga q k pehly apni value add ho gai hai es k bad nahe ho ge jab sum me value add ho jai ge tab a ke value 4 ho jai ge

Decrement
a--
--a
ye 1 ko sub.. kary ga value se

Prefix decre…
--a
sum=h+d+ --a
to result 4 aye ga sum ka and a ke value 2 ho jai ge q k pehly se 1 sub.. ho jay ga then sum me add ho ga ..

postfix decr…
a--
es me pehly value ka result aye ga then 1 sub ho ga
sum=h+d+a--
to sum ka result 5 aye ga q k 3 value gai then a se ek sub ho k a ke value 2 ho jai ge par result 5 aye ga q k pehly sum me add hoa hai


Comment
comment statement kabi execute nahe hoti ye user apny kam ko asan banny k lay use karta hai k us ko ye pata chaly k me ne ye variable whatever  kes lay use kia hai comment k lay // use karny gy jo b comment lakin gy wo // k bad alakny gy