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Chapter 6

Chapter 6

3 Pages
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Department
Information Technology Management
Course Code
ITM 200
Professor
Vikraman Baskaran

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Chapter 6 Loops
While Loop
Executes a group of statements as long as a condition is true
Before the loop starts, it checks the condition of the while loop is true, if not the loop
is not run
Programmer use while loop, with the number times it should loop is unknown
Well suited to writing indefinite loops
A while loop may be used if the number of repetitions is not known, as in the
case of reading the numbers until the input is 0
The while loop, general syntax:
while (<condition>) {
<statement(s)> ;
}
Example:
int number = 1;
while (number <= 200) {
System.out.print(number + " ");
number *= 2;
Sentinel Value is an input value to signify to end the loop
The do/while Loop
-Executes statements repeatedly while a condition is true, testing it at the end of each
repetition
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Description
Chapter 6 – Loops While Loop • Executes a group of statements as long as a condition is true • Before the loop starts, it checks the condition of the while loop is true, if not the loop is not run • Programmer use while loop, with the number times it should loop is unknown • Well suited to writing indefinite loops • A “while” loop may be used if the number of repetitions is not known, as in the case of reading the numbers until the input is 0 The while loop, general syntax: while () { ; } Example: int number = 1; while (number <= 200) { System.out.print(number + " "); number *= 2; Sentinel Value – is an input value to signify to end the loop The do/while Loop - Executes statements repeatedly while a condition is true, testing it at the end of each repetition www.notesolution.com - Similar to a while loop, except that its body statement(s) will always execute the first time, regardless of whether the condition is true or false - A “do-while” loop can be used to replace a while
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