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  1. #include<stdio.h>
  2.  
  3. int main(){
  4. int i, sum=1;
  5.  
  6. for(i=1;i<=5;i++){
  7. sum=sum+(i-1);
  8. }
  9. printf("The Summation of This Series is %d",sum);
  10.  
  11. return 0;
  12.  
  13. }
Success #stdin #stdout 0s 4364KB
stdin
Standard input is empty
stdout
The Summation of This Series is 11