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  1. #include <stdio.h>
  2. int main(void)
  3. {
  4.     int n;
  5.     printf("Input n:");
  6.     scanf("%d", &n);
  7.     int sum = 0;
  8.     int i = 1;
  9.     do
  10.     {
  11.     sum = sum + i;
  12.     i++;
  13.     }while(i <= n);
  14.     printf("sum = %d\n",sum);
  15.     return 0;
  16. }
  17.  
Success #stdin #stdout 0s 5320KB
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stdin
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stdout
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Input n:sum = 55
https://ideone.com/ex5l1h
language:
C (gcc 8.3)
created:
2 days ago
visibility:
public

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