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  1. #include <stdio.h>
  2.  
  3. int main(void)
  4. {
  5.     int  n;
  6.     printf("Input n:");
  7.     scanf("%d", &n);
  8.     int sum=0;    
  9.     for(int i=1;i<=n;i++)
  10.     {
  11.        sum=sum+i;
  12.     }
  13.     printf("sum = %d\n", sum);
  14.     return 0;
  15. }
  16.  
Success #stdin #stdout 0s 5280KB
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stdin
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100
stdout
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Input n:sum = 5050
https://ideone.com/SFwYc2
language:
C (gcc 8.3)
created:
8 hours ago
visibility:
public

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