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error: 'n' cannot be used as a function| || c++

using namespace std;

int main()
int n,sum;
cout<<"enter the number to find the sum upto that :";


cout<<"the sum of all natural number upto "<<n<<"is :"<<sum;


How to resolve Error I'm getting below:

|error: 'n' cannot be used as a function|
||=== Build failed: 1 error(s), 0 warning(s) (0 minute(s), 1 second(s)) ===|
Sep 16 '21 #1
1 5745
636 Expert 512MB
Expand|Select|Wrap|Line Numbers
  1. #include<bits/stdc++.h>
  2. using namespace std;
  4. int main()
  5. {
  6. int n,sum;
  7. cout<<"enter the number to find the sum upto that :";
  8. cin>>n;
  10. sum=n(n+1)/2;
  12. cout<<"the sum of all natural number upto "<<n<<"is :"<<sum;
  14. }

How to resolve Error I'm getting below:

|error: 'n' cannot be used as a function|
||=== Build failed: 1 error(s), 0 warning(s) (0 minute(s), 1 second(s)) ===|
Probably meant to be this
Expand|Select|Wrap|Line Numbers
  1. sum=n*(n+1)/2;
‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎
Sep 18 '21 #2

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