Both loop constructs have the same syntax:
while [test expression]
do
commands
done
until [test expression]
do
commands
done
Where they differ is that the 'while' loop only executes where the test expression evaluates as True, whereas the 'until' loop executes where the expression evaluates as False.
Functionally, you could achieve the same result using either loop construct by altering the test expression. Eg.:
while [n -gt 5] #n is greater than 5
is functionally identical to
until [n -le 5] #n is less than or equal to 5
Repeat until loops run until a condition is true. They repeat at the end of the loop and they will always run at least once. While do loops will only run while a condition is true. They may not run at all.
There is no such difference, for and while loops are convertible: in: for (exp1; exp2; exp3) stmt; out: { exp1; while (exp2) { stmt; exp3; }} in: while (exp) stmt; out: for (; exp; ) stmt;
difference between production company and manufacturing company
A virus runs in a thread, as do all programs. The difference between a generic thread and a virus is that the thread may not be harmful, while the virus generally is.
ohms is the unit of resistance while volts is the unit of voltage
They are different ways of presenting documentation for applications in Linux. man pages are typically single pages, while info pages are somewhat more friendly looking, and spread out across multiple pages.
grab a stopwatch and boot the system up while timing it until it gets to login
ten or more years of development depending on your version of Ubuntu. Ubuntu is a modern Linux distribution while windows 95 is an aging and unsupported parent of the current windows environment.
the difference between it's and it..is that it's means it is, while "it" is direct to the object .
Different is an adjective while difference is a noun
SUSE Enterprise is made to run on servers(which use different platforms to organize the web page) while SUSE Linux professional is desktop Linux with special mods and cool platforms for high tech work in offices and studios.
the difference between concentrated and dilute is concentrated is larger while dilute is smaller.
Do while and Do until are interchangeable, and they take the opposite condition. Do While executed the body of the loop while (condition=true), and Do until executes body of loop until (condition=true). For example, if I was doing a Loop to say, while the check box is checked, display a message box (Never do this btw, it's just an example) I could either say Do While (MyCheckBox.Checked = True) Loop or Do Until (MyCheckBox.Checked <> True) Loop
In baseball they can leave while the pitcher still has the Ball. but in softball they have to wait until the ball is released from the pitchers hand.
The difference between "i" and "I" is that "I" is always capitalized when referring to oneself as a pronoun, while "i" is not capitalized.
There are allot of difference but the main difference is the science is discovered while the literature is invented
red hat enterprise Linux is used as a server while red hat Linux is used as client..