Programul calculeaza S=1+2+3+…+n
#include <stdio.h>
void main()
{ int suma, n, numar;
printf(“Introduceti n: “);
scanf(“%d”,&n);
if (n >= 0)
{ suma = 0;
for(numar = 1;
numar <= n; numar = numar + 1)
{ suma = suma + numar; }
printf(“suma = %d\n”, suma); }
else { printf(“n nu poate fi negativ!\n”); }
}