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  1. #include <stdio.h>
  2.  
  3. int main()
  4. {
  5. 	int triNum = 0;
  6. 	int n;
  7.  
  8. 	for(n = 5; n <= 50; n = n + 5)
  9. 	{
  10. 		triNum = n * (n + 1)/2;
  11. 		printf (" %d %d\n", n, triNum);
  12. 	}
  13. 	return(0);
  14. }
  15.  
Success #stdin #stdout 0.01s 5300KB
comments (?)
stdin 
Standard input is empty
stdout 
 5 15
 10 55
 15 120
 20 210
 25 325
 30 465
 35 630
 40 820
 45 1035
 50 1275
https://ideone.com/7KzjtI
language:
C (gcc 8.3)
created:
1 day ago
visibility:
public

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