The For Statement

#include <stdio.h>

/* print Fahrenheit-Celsius table */
main()
{
  int fahr;

  for (fahr = 0; fahr <= 300; fahr = fahr + 20)
    printf("%3d %6.1f\n", fahr, (5.0/9.0)*(fahr-32));
}

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Concepts: Complex expressions in place of simple variables

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Shorthand: fahr = fahr + 20 can be written fahr += 20