for Loop

The C for loop is very general

      for (init-statement; test-expression; increment-expression)
      { statement
        . . .
      }

• the test expression can be any that returns a numeric value, like if or while blocks

• function calls and I/O are also allowed

• example

        for ( i = 1; i <= j; i += k )
        { statement
          . . .
        }