print Series -1 2 -3 4 -5 6 -7........

1 2 3 4 5 6 7 8 9 10 11 12 13

#include <stdio.h> int main() { int s,i; for(i=1,s=1;i<=10;i++) { s=s*(-1); printf("%d\t",i*s); } return 0; }

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