# Connexions

You are here: Home » Content » Freshman Engineering Problem Solving with MATLAB » Programming with M-Files: While-Loop Drill Exercises

### Recently Viewed

This feature requires Javascript to be enabled.

Inside Collection (Course):

Course by: Darryl Morrell. E-mail the author

# Programming with M-Files: While-Loop Drill Exercises

Module by: Darryl Morrell. E-mail the author

Summary: This module provides several simple exercises designed to test and increase your understanding of while loops in m-files.

## Some While Loop Exercises

### Exercise 1

How many times will this loop print 'Hello World'?


n = 10;
while n > 0
disp('Hello World')
n = n - 1;
end


10 times.

### Exercise 2

How many times will this loop print 'Hello World'?


n = 1;
while n > 0
disp('Hello World')
n = n + 1;
end


#### Solution

This loop will continue to print 'Hello World' until the user stops the program. You can stop a program by holding down the 'Ctrl' key and simultaneously pressing the 'c' key.

### Exercise 3

What values will the following code print?

a = 1
while a < 100
a = a*2
end


#### Solution

a =
1
a =
2
a =
4
a =
8
a =
16
a =
32
a =
64
a =
128

### Exercise 4

What values will the following code print?


a = 1;
n = 1;
while a < 100
a = a*n
n = n + 1;
end


#### Solution


a =
1
a =
2
a =
6
a =
24
a =
120


## Content actions

PDF | EPUB (?)

### What is an EPUB file?

EPUB is an electronic book format that can be read on a variety of mobile devices.

PDF | EPUB (?)

### What is an EPUB file?

EPUB is an electronic book format that can be read on a variety of mobile devices.

#### Collection to:

My Favorites (?)

'My Favorites' is a special kind of lens which you can use to bookmark modules and collections. 'My Favorites' can only be seen by you, and collections saved in 'My Favorites' can remember the last module you were on. You need an account to use 'My Favorites'.

| A lens I own (?)

#### Definition of a lens

##### Lenses

A lens is a custom view of the content in the repository. You can think of it as a fancy kind of list that will let you see content through the eyes of organizations and people you trust.

##### What is in a lens?

Lens makers point to materials (modules and collections), creating a guide that includes their own comments and descriptive tags about the content.

##### Who can create a lens?

Any individual member, a community, or a respected organization.

##### What are tags?

Tags are descriptors added by lens makers to help label content, attaching a vocabulary that is meaningful in the context of the lens.

| External bookmarks

#### Module to:

My Favorites (?)

'My Favorites' is a special kind of lens which you can use to bookmark modules and collections. 'My Favorites' can only be seen by you, and collections saved in 'My Favorites' can remember the last module you were on. You need an account to use 'My Favorites'.

| A lens I own (?)

#### Definition of a lens

##### Lenses

A lens is a custom view of the content in the repository. You can think of it as a fancy kind of list that will let you see content through the eyes of organizations and people you trust.

##### What is in a lens?

Lens makers point to materials (modules and collections), creating a guide that includes their own comments and descriptive tags about the content.

##### Who can create a lens?

Any individual member, a community, or a respected organization.

##### What are tags?

Tags are descriptors added by lens makers to help label content, attaching a vocabulary that is meaningful in the context of the lens.

| External bookmarks