5.4 Examples Using the for Statement

The following examples show techniques for varying the control variable in a for statement. In each case, we write only the appropriate for header. Note the change in the relational operator for the loops that decrement the control variable.

  1. Vary the control variable from 1 to 100 in increments of 1.

    
for (unsigned int i{1}; i <= 100; i++)

  2. Vary the control variable from 100 down to 1 in decrements of 1.

    
for (unsigned int i{100}; i >= 1; i--)

  3. Vary the control variable from 7 to 77 in increments of 7.

    
for (unsigned int i{7}; i <= 77; i += 7)

  4. Vary the control variable from 20 down to 2 in decrements of 2.

    
for (unsigned int i{20}; i >= 2; i -= 2)

  5. Vary the control variable over the values 2, 5, 8, 11

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