Question

How to print this series: 1, -2, 3, -4, 5, -6, 7, -8, 9, -10 in C

Answer 1

#include <stdio.h> 

int main(void)
{
    int i, negative = 1;
    
    for (i = 1; i <= 10; i++)
    {
        printf("%4d", i * negative);
        negative *= -1;
    }
            
    return 0;
}


/*
run:

1  -2   3  -4   5  -6   7  -8   9 -10

*/ 

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