FORTRAN

Question 1

!text

Answer 1

Comments

Question 2

print *, ‘text’

Answer 2

Outputs ‘text’ to the screen

Question 3

*

Answer 3

means use the default number of decimal places when the number is written to the screen

Question 4

What is the significance of ‘implicit none’

Answer 4

By including it in your program, FORTRAN will check that you have properly declared all your variable types.

Question 5

Translate: x=2

Answer 5

store the value “2” in memory location “x”

Question 6

Translate: y=3

Answer 6

store the value “3” in memory location “y”

Question 7

Translate: z=x+y

Answer 7

Add the values stored in memory location “x” and “y” and store the result in memory location “z”

Question 8

How many variable names can be on the left hand side of an equals sign

Answer 8

One!

Question 9

+ , -

Answer 9

plus and minus

Question 10

• , /

Answer 10

multiply and divide

Question 11

**

Answer 11

exponentiation (raise to the power)

Question 12

( )

Answer 12

brackets

Question 13

Does FORTRAN follow the order of operations?

Answer 13

yes

Question 14

sin(x)

Answer 14

sine

Question 15

cos(x)

Answer 15

cosine

Question 16

tan(x)

Answer 16

tangent

Question 17

atan(x)

Answer 17

arctangent

Question 18

abs(x)

Answer 18

absolute value

Question 19

sqrt(x)

Answer 19

square root

Question 20

exp(x)

Answer 20

e^x

Question 21

log(x)

Answer 21

log base 10 of x

Question 22

Are trigonometric functions calculated in radians or degrees?

Answer 22

radians

Question 23

if … end if

Answer 23

if (condition is true) then
    execute this line
    and this
    and so on until we get to ...
end if

Question 24

==

Answer 24

equal to

Question 25

=

Answer 25

assignment of value

Question 26

if, else, endif

Answer 26

if (choice == 1) then
    do something
else if (choice == 2) then
    do something else
else
    do this if nothing else satisfies the conditions
end if

Question 27

/=

Answer 27

not equal to

Question 28

<

Answer 28

less than

Question 29

<=

Answer 29

less than or equal to

Question 30

>

Answer 30

greater than

Question 31

> =

Answer 31

greater than or equal to

Question 32

.and.

Answer 32

combine two “if ( ) then” statements

Question 33

.or.

Answer 33

combine two “if ( ) then” statements

Question 34

stop

Answer 34

command stops the program

Question 35

do i=0,20

Answer 35

i is called a loop counter. each time the statements are executed,t he loop counter, i, is incremented by 1. When the value of i is 20, the loop terminates, and the program resumes after the end do.

Question 36

do i=50,70,2 !What is “2” in this line?

Answer 36

2 is the increment step

Question 37

translate: x=x+1.0

Answer 37

Add 1.0 to the value currently stored in memory location”x” and then store the result in memory location “x.”

Question 38

mod

Answer 38

“mod” returns the remained of the first argument divided by the second.

Question 39

What is the number of decimal precision for “single precision”?

Answer 39

6