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Round up a value ceil

#include <stdio.h> #include <math.h> int main () { printf ("ceil of 2.3 is %.1lf\n", ceil (2.3) ); printf ("ceil of 5.8 is %.1lf\n", ceil (5.8) ); printf ("ceil of -4.3 is %.1lf\n", ceil (-4.3) ); printf ("ceil of -2.8 is %.1lf\n", ceil (-2.8) ); return 0; }