difference between for and while loops

[clavier]

whats is the output that statement

for( x=1;x<=10;x=+1)

cout<<x<<endl;

i know the outpout will b 12345678910

but for this statement i did not get it

x=8
while(x<10)
x=x+1
cout<<x;

dont know what would be the output

[pogrady]

910

Btw your syntax is wrong. If you want to increment a variable by one, just call the increment operator:

X++

=+ is not valid syntax. Is it actually +=.

[clavier]

yeah this one is just error in typing but the second statement i am trying to figure out what would be the output

[vichu8888]

If you use braces for 'while' the output will be

910

otherwise if you use above code,the output will be

10

[owbkoG1T]

for( x=1;x<=10;x=+1)

cout<<x<<endl;

1 (on a new line because of endl) infinitely, x = +1 mean "x equals positive one", therefore x will never be anything but 1.

x=8
while(x<10)
x=x+1
cout<<x;

10, the cout statement is not a part of the loop (no curly braces).

[clavier]

If you use braces for 'while' the output will be
910

how did u get to that....sorry its my first class in c++

[Moeljbcp]

int x = 8; // Declare x as an integer and set it to 8

while (x < 10)  // While x is less than 10 ..
{
	x = x+1; //Add one to x
	cout << x; //And then print x
}

It will loop over the stuff inside the { }, each time checking to see if x < 10 is still true. Once x is 10, it isn't anymore, and it'll move past it. So the first time, it'll add one, then print x. "9". 9 is less than 10, so it'll do it again. Add one, and print it. "10". 10 is not less than 10 so it doesn't do it again. Final output is "910"

[vichu8888]

int x=8;
while(x<10)
{
x=x+1//line 1
cout<<x;//Line 2
}

Above one using braces.
Because 'while' or 'if-else' or 'switch' or 'for' control structures execute only one line of code below to them ,if you dont use braces.
in your code the while(x<10) execute for only x=x+1;
cout<<x; is not part of while loop

[clavier]

ok i got you but how about the first one with for for( x=1;x<=10;x=+1)

cout<<x<<endl;

the cout is a part of the loop

[TheIdeasMan]

The normal idiom for doing something 10 times is:

for( int x=0;x<10;x++) {
    cout << x+1 << endl;
    //do your stuff here
}

As a while loop:

int x=0;
while (x<10) {
    cout << x+1 << endl;
    x++;
}

And that while can be shortened like this:

int x=0;
while (x<10) {
    cout << ++x << endl;
}

[clavier]

but in case i have curly braces for the while statemnt why 10 as an answer as long as 10<10 is not impossible

[TheIdeasMan]

Your reply doesn't make sense, It's OK maybe English is not your first language, so my reply is this:

Did you try running the code for my last example of the while loop?