Loop

Question

#include <iostream>
using namespace std;

int main()
{
int a=2;
for(;;a+=a)
{ if (a>5)
break;
}
cout<<a;
return 0;
}

ans is 8 ..plz explain ... m nt getting it

Answer 1

you have not given condition in *for* but in the *if* you have given condition to give output only when a>5 so when it run
a+a =2+2=4 but it is not output as your condition so again a+a=4+4=8 is your final output

Answer 2

The for-clause is executed 3 times. a+=a means:
a=2
a+=2 // result 4
a+=4 // result 8

You should restructure the loop and let the break-condition be inside the for-statement:

for{/*variable initialization*/;/*condition for break*/;/*iteration rule*/)

so that:
for(;a>5;a+=a) {}

"a+=a" means "a=a+a" so that's probably not what you wanted.

Answer 3

thank u guys ..:)