hi, can someone help me with this? i dont know how to make a program for this
#Making addition pattern
wintry fossil
gusty bladeBOT
knotty island
You've learned about for loops already ?
wintry fossil
You've learned about for loops already ?
using if else and for?
knotty island
Here you just need for loop logic
knotty island
How would you write a for loop which prints from 1 to 3
wintry fossil
How would you write a for loop which prints from 1 to 3
cout<<"Enter the value of n: ";
cin>>x;
for(i=0;i<x;++i)
{
n3=n1+n2;
cout<<n3<<" ";
n1=n2;
n2=n3;
}```1 thing directly, don't declare i outside of the loop if you don't need it outside of the loop.
So it would look like this instead
int n2=1,n1=0,n3,x;
cout<<"Enter the value of n: ";
cin>>x;
for(int i=0;i<x;++i)
{
n3=n1+n2;
cout<<n3<<" ";
n1=n2;
n2=n3;
}
oh okay
wintry fossil
1 thing directly, don't declare `i` outside of the loop if you don't need it out...
what should i do next?
knotty island
In either case, i had the hope that you'd just write it as
int main()
{
int n = 3; // repalce with user input
for(int i = 1; i < n + 1; i++)
{
std::cout << i;
}
}
So that we could extend from here
This alone will just print from 1 to 3 till we'd take user input to change that dynamically
wintry fossil
In either case, i had the hope that you'd just write it as
```cpp
int main()
{
...
ah yes i put too many unecessary variables
knotty island
Just to make things clear, i do n + 1 so that we can start with an index of 1, if we'd start with a index of 0 we would need to do this + 1 logic in the loop body itself which can get messy pretty quickly
wintry fossil
Just to make things clear, i do `n + 1` so that we can start with an index of `1...
hmm true
knotty island
So what would you try if you'd need to extend from this on your own ?
wintry fossil
So what would you try if you'd need to extend from this on your own ?
how do i state an endline in a loop?
knotty island
endline as in a new line ?
wintry fossil
yes
knotty island
Either << std::endl or << '\n'.
Usually you should prefer \n over std::endl as std::endl is doing additional stuff which isn't always needed
wintry fossil
ah okay thanks
using namespace std;
int main()
{
int n,a,b,c;
cout << "Enter the value of n: ";
cin >> n;
for(int i = 1; i < n + 1; i++)
{
cout << i << " + " << i << " = " << i+i << "\n";
}
}```so i made it like this
but it only shows the same numbers additions
1 + 1 = 2
2 + 2 = 4
knotty island
Yeah, the problem here is that you try to do it with a single loop.
But here's the trick. You can just have a loop in a loop
wintry fossil
what-
knotty island
Generally i'd like to avoid showing the solution directly, but i do know that it can help to understand.
So, would you like to see a solution or rather not ?
knotty island
#include <iostream>
int main()
{
for(int outer = 0; outer < 5; outer++)
{
for(int inner = 0; inner < 5; inner++)
{
std::cout << "outer: " << outer << " | " << "inner: " << inner << '\n';
}
}
}
;compile
jagged sedgeBOT
wintry fossil
okay I'll try it
wintry fossil
```cpp
#include <iostream>
int main()
{
for(int outer = 0; outer < 5; outer++...
#include <iostream>
using namespace std;
int main()
{
int n,a,b;
cout << "Enter the value of n: ";
cin >> n;
for(int a=1; a<=n; a++)
{
for(b=1; b<=n; b++)
{
cout <<a<<" + "<< b << " = "<< a+b<< "\n";
}
}
return 0;
}
it worksss
TYSM
knotty island
Looks good, also a smart move to use <= here xD
That would've been my version
#include <iostream>
int main()
{
int n;
std::cout << "Enter the value of n: ";
std::cin >> n;
n += 1; // Just here to remove the + 1 logic in the loop
for(int outer = 1; outer < n; outer++)
{
for(int inner = 1; inner < n; inner++)
{
std::cout << outer << " + " << inner << " = " << outer + inner << '\n';
}
}
}
There are 3 things you should improve tho.
int n,a,b;
a and b should not be there, it's only needed in the loop itself so better keep it in the loop scope.
You try to give your variable meaningful names. It might be easy to understand now as you wrote it, but in a few days, weeks, months.. it might make no sense at all
You should get rid of the using namespace std; habit as it's very error prone.
I'll send you 2 resources through the bot
wintry fossil
There are 3 things you should improve tho.
1.
```cpp
int n,a,b;
```
`a` and `b`...
oh yes i forgot the 1st point sorry
wintry fossil
oo i thought it would've be easier haha, thank you for telling me this
gusty bladeBOT