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  1. #include <stdio.h>
  2.  
  3. int main(void) {
  4.  
  5. 	int a,i,sum=0;
  6. 	scanf("%d",&a);
  7.  
  8. 	for(i=1;i<=a;i++){
  9. 		sum=sum+i;
  10. 		}
  11. 		printf("1から%dまでの和は%dです",a,sum);
  12. 	return 0;
  13. }
Success #stdin #stdout 0s 5308KB
comments (?)
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5
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1から5までの和は15です
https://ideone.com/XBUPtE
language:
C (gcc 8.3)
created:
1 day ago
visibility:
public

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