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  1. #include <stdio.h>
  2.  
  3. int main(void) {
  4. int val,sum=0,i;
  5. printf("enter a number");
  6. scanf("%d",&val);
  7.  
  8. for(i=1;i<=val;i++){
  9. sum=sum+i;
  10. }
  11. printf("sum:%d,sum");
  12. return 0;
  13. }
  14.  
Success #stdin #stdout 0.01s 5288KB
stdin
10
stdout
enter a numbersum:-837638768,sum