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  1. #include <stdio.h>
  2.  
  3. int main() {
  4.  
  5.     int n, i, sum= 0;
  6.  
  7. 	printf("Enter the last number of your series: ");
  8. 	scanf("%d", &n);
  9.  
  10. 	printf("1 + 2 + 3 + ..... + %d", &n);
  11.  
  12. 	for(i=1; i<=n; i++)
  13. 	{
  14. 	    sum= sum +i;
  15. 	}
  16.         printf("= %d",sum);
  17. }
  18.  
  19.  
Success #stdin #stdout 0s 5288KB
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stdin
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45
stdout
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Enter the last number of your series: 1 + 2 + 3 + ..... + 1190881508= 1035
https://ideone.com/h9eddb
language:
C++14 (gcc 8.3)
created:
24 days ago
visibility:
public

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