For Loops!!!

I dont understand for loops, like this one:

Code:

---

#include <iostream.h>     
int main()                     
{       
for(int x=0;x<100;x++)
{                                                                  cout<<x<<endl;         
}
std::cin.get();
return 0;
}

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How can I make it go up by 5, or by 10 till it gets to 100, how does the x++ work? I get x=0 and x<100, but not x++... can someone explain for loops to me?

Quote:

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Originally posted by Nailogamer
I dont understand for loops, like this one:

Code:

---

#include <iostream.h>     
int main()                     
{       
for(int x=0;x<100;x++)
{                                                                  cout<<x<<endl;         
}
std::cin.get();
return 0;
}

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-How can I make it go up by 5, or by 10 till it gets to 100?
----------
-how does the x++ work?

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-for(int x=0;x<100;x+=10)
----------
- ++ is an increment operator, which means it adds the number by one.

So if you had the following code,

int x=5;
x++;

x would be 6.

x++;
is the same as
x + 1;

You should read Tutorial : loops

Quote:

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Nailogamer wrote: For Loops!!!
For Loops!!!
I dont understand for loops, like this one:

Code:

---


code:--------------------------------------------------------------------------------
#include <iostream.h>     
int main()                     
{       
for(int x=0;x<100;x++)
{                                                                  cout<<x<<endl;         
}
std::cin.get();
return 0;
}
--------------------------------------------------------------------------------



How can I make it go up by 5, or by 10 till it gets to 100, how does the x++ work? I get x=0 and x<100, but not x++... can someone explain for loops to me?

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This should work fine

Code:

---

#include <iostream> // iostream.h will also work

int main()                     
{       
for(int x=0;x<100;x+=5)  // increment each value of x by 5;
 {
cout<<x<<endl;         
}
std::cin.get();
return 0;
}
 //Or even if you dont get this then have look at this
int main()                     
{       
for(int x=0;x<100;)  //  No increment here
{
x = x + 5;              //increment each value of x by 5;
cout<<x<<endl;         
}
std::cin.get();
return 0;
}

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Take it slow, and make sure you understand loops... for-loops, do-loops, and do-while-loops.

Because, loops (doing stuff over-and-over) and decision making ("branching" with if and switch/case statements) are the two basic concepts that make all programming worthwhile!

Quote:

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Originally posted by laasunde
x++;
is the same as
x + 1;

You should read Tutorial : loops

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No, imho x++ equals x=x+1.

Code:

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for(int x=0;x<100;x++)

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int x=0 creates and initializes an integer variable with the value 0.

After the first semicolon, x<100 is the condition for the loop. The loop will end if this condition returns false (i.e. assume "x" is 101 then the condition would be 101<100 which is not true and would cause "for" to exit the loop)

After the second semicolon, x++ means that x will be incremented by one for every time the the code in the loop has been executed.

Notice that the order is important.