Language C
Description It reads a number and informs the user if it is positive or negative.
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#include <stdio.h>
#include <stdlib.h>

int main (void)
{
    float a_number;
    printf ("Enter the value of a number: ");
    scanf ("%f", &a_number);
    (void) getchar ();
    if(a_number<0)
        printf ("Negative\n");
    else
        printf ("Positive\n");
    putchar ('\n');
    system ("pause");
    return EXIT_SUCCESS;
}