Math 3250 Test 1

Front 1

Base 2 Log ?

Back 1

log2(x)

Front 2

How to get value of e ?

Back 2

exp(1)

Front 3

Inverse Trig of sine ?

Back 3

asind(x)

Front 4

Degree version of sine ?

Back 4

sind(x)

Front 5

Natural logarithm? (ln) ?

Back 5

log(x)

Front 6

True or False?

Pi is a constant?

Back 6

True

Front 7

Base 10 Log?

Back 7

log10(x)

Front 8

Field Specifications:

%c

Back 8

Will print out ONE character

Front 9

Field Specifications:

%s

Back 9

Will print out an entire string

Front 10

Programming Essentials:

A program must have what?

Back 10

Memory / Operations / Branching

Front 11

What is echo, and how to suppress it?

Back 11

Instant display of calculation as a command is executed.

Suppress with semicolon ;

Front 12

What is Left Division?

What is B\A

Back 12

B\A divideseach element of A by the corresponding elementof B.

Front 13

Negative sign counts as multiplication by ?

Back 13

(-1)

Front 14

-3.1415

How many significant digits?

How many character spaces used?

Back 14

Significant digits = 5

Total number of character spaces used = 7

Front 15

0.000002718

How many significant digits?

How many character spaces used?

Back 15

Significant digits = 4

Total number of character spaces used = 11

Front 16

The keyword "if" structure must end with ?

Back 16

"end"

Front 17

Does the end line require a semicolon?

Back 17

No, the end line does not require a semicolon.

Front 18

True or False

The if must have a logical expression (condition) after it?

Back 18

True, and it does NOT end with a semicolon

Front 19

What is the largest integer that can be displayed without extra formatting?

Back 19

999999999 (nine digits)

Front 20

Logical variables:

Zero = ?

Back 20

False

Front 21

Logical variables:

Any non-zero number = ?

Back 21

True

Front 22

Never compound comparisons:

4>3>2 is (true / false) ?

Back 22

False

Front 23

format long

allows how many significant digits?

Back 23

generally 15 or 16 , usually up to 15 after the decimal point.

Front 24

True or False?

The last digit is a rounded digit?

Back 24

True, there is a HIDDEN digit and the last displayed digit is rounded.

Front 25

A variable is a place to store data, what are the two types of data we have seen?

Back 25

numerical and string data.

Front 26

True or False ?

There should be a block of code with the "if", with each "elseif", and the "else" ?

Back 26

True

Front 27

What would you type in the command window to execute the file Snowman.m?

Back 27

2 possible answers

Snowman

or

run Snowman.m

Front 28

How many things get printed out if we execute... (assume proper indentation)

S = 0;

for k = 1:10

S=S+k;

disp(S);

end

Back 28

10 numbers.

It completes the for loop a total of 10 times. Displaying S 10 times.

Front 29

What symbol allows us to write more than one statement on a line?

Back 29

the semicolon ;

example

x = 5; y = 2; z = 1.0;

Front 30

What does the clc command do?

Back 30

Clears the command line window.

Front 31

What does the clear command do?

Back 31

Erases the Workspace variables.

Front 32

%10.3f

What does the 10 mean?

What does the 3 mean?

What does the f stand for?

Back 32

10 total spaces should be used.

3 digits after the decimal should be used.

float (like floating point number)

Front 33

Field specifications:

%d

Back 33

Will print out an integer

Front 34

What function would you use to read something in from the keyboard?

Back 34

The input() function

example

userAnswer = input("Please enter your age: );

Front 35

What do you type in a program to make it stop executing at a specific point?

Back 35

return;

example (assume proper indentation)

if doughnut > 2

disp("Whew! I'm full. I'm taking a nap..\n"); return;

end

Front 36

For arithmetic and functional operations, the order of operations is:

Back 36

( )

^

*,/ , \

+,-

Front 37

True or False?

-12 && 5.3

Back 37

Statement is true, or a logical 1

0 equals false

All other numbers are a logical 1

So true && true

Front 38

what does disp() display?

Back 38

Can output a single object OR a single string

(not both)

Front 39

What is the \n called?

Back 39

Carriage control

It puts the cursor on the next line of where the string is being outputted.

example disp("wow.\nThis is output on the next line\n\nwowie")

Front 40

We want to stop a loop when a == 2 && b ~=2

How do we write the condition inside the for-loop?

Back 40

if ~(a==2 && b~=2); return; end

The tilde ~ is negating our original condition.