do-while Loops

1
Programming

• do-while Loops

2
The do-while Statement

• Syntax
• do action
• while (condition)
• How it works
• execute action
• if condition is true then execute action again
• repeat this process until condition evaluates to
  false.
• action is either a single statement or a group of
  statements within braces.

action
condition
true
false
3
N!

• int number, factorial, counter
• cout ltlt "Enter a positive integer" cin gtgt
  number
• factorial 1
• counter 1
• do
• factorial counter
• counter while(counter lt number)
• cout ltlt "The factorial of " ltlt number
• ltlt " is " ltlt factorial ltlt endl

4
2N

• int number, result, counter
• cout ltlt "Enter a positive integer" cin gtgt
  number
• result 1
• counter 1
• do
• result 2
• counter while (counter lt number)
• cout ltlt "Two raised to the " ltlt number
• ltlt " power is " ltlt result ltlt endl

5
Maximum

• int value // input value
• int max0 // maximum value
• do
• cout ltlt "Enter a positive number
• ltlt "(-1 to stop)" cin gtgt
  value
• if(value gt max)
• max value
• while(value!-1)
• cout ltlt "The maximum value found is " ltlt max
  ltlt endl

6
Waiting for a Reply

• char reply
• do
• // do something
• cout ltlt "Continue(y/n) "
• cin gtgt reply
• while(reply!'n')