Python :)

Question 1

If/else if/else structure in python

Answer 1

if condition : 
     #statements
elif condition : 
     #statements 
else:
     #statements

Question 2

For loop in python

Answer 2

for identifier in range (int,int): 
    #statements 

This is non inclusive (eg in range (0,5) will only run where the identifier is 0,1,2,3 and 4)

Can also be used like

for identifier in range (int,int,increment): 
    #statements 

Also non inclusive for the second int

for identifier in StringExp:
   # statements 

Starts counting from 0, and ends on 1 less than the number of letters in the word

Question 3

Userinput in python

Answer 3

Identifier = input(input prompt)

Question 4

Modulus in python

Answer 4

%

Eg 5%2 would return 1

Question 5

Integer division in python

Answer 5

//
Eg 5//2 evaluates to 2

Question 6

Output in python

Answer 6

Print (Exp)

Question 7

Random number in python

Answer 7

from random import rand range

randrange( IntExp, IntExp)

The second IntExp is exclusive

Eg.

from random import randrange
num1 = randrange(3, 7)
# generates an integer between 3 and 6

Question 8

Less than in python

Answer 8

Exp < Exp

Eg.
4 <6
“A” < “B”
“adam” < “adele”

Question 9

Greater than (pyth)

Answer 9

Exp > Exp

Question 10

Equal to (pyth)

Answer 10

Exp == Exp

Question 11

Not equal to (pyth)

Answer 11

Exp != Exp

Question 12

Less than or equal to (pyth)

Answer 12

Exp <= Exp

Question 13

Greater than or equal to

Answer 13

Exp >= Exp

Question 14

Relational operators can be used on (pyth)

Answer 14

Numbers strings and characters

Question 15

Logical AND (pyth)

Answer 15

BoolExp and BoolExp

Eg,

(3 == 3) and (3 <= 4)

Question 16

Logical OR (pyth)

Answer 16

BoolExp or BoolExp

Question 17

Logical NOT

Answer 17

not BoolExp

Question 18

While loop (pyth)

Answer 18

while BoolExp:
   # indented statements here

Question 19

Repeat until loop (pyth)

Answer 19

# statements here while BoolExp:
   # copy of statements here (indented)

Question 20

Length of array

Answer 20

len(Identifier)

Question 21

For loop for the length of an array

Answer 21

for Identifier in ListExp:
# indented statements here

Question 22

Defining Subroutine in python

Answer 22

def Identifier(parameters): 
   # indented statements here

Question 23

Subroutine return value

Answer 23

return Exp

Question 24

Calling subroutines

Answer 24

Identifier(parameters)

Question 25

String length

Answer 25

len(StringExp)

Question 26

Position of a character

Answer 26

StringExp.find(CharExp)

Question 27

Substring of a string

Answer 27

StringExp[IntExp:IntExp]
Last IntExp is exclusive

Starts counting from 0

Question 28

Accessing a single character in a string

Answer 28

StringExp[IntExp]

Starts counting from 0

Question 29

String concatenation

Answer 29

StringExp + StringExp

Question 30

Convert string to integer

Answer 30

int(StringExp)

Question 31

Convert string to real

Answer 31

float(StringExp)

Question 32

Convert integer to string

Answer 32

str(IntExp)

Question 33

Convert real to string

Answer 33

str(RealExp)

Question 34

Converting character to character code

Answer 34

ord(CharExp)

Question 35

Converting character code to character

Answer 35

chr(IntExp)

Question 36

Input in python

Answer 36

input(StringExp)

StringExp is the prompt

Question 37

Output in python

Answer 37

print(Exp, …,Exp)

Eg
print (“a”, “g”) will output
a g

print("Mary had ", end="")
print("a little lamb")
# will print the text on the same line due to end=“”

Question 38

Formatted output

Answer 38

f”…{identifier}…{identifier}…”

Eg.

name = "BT"
staff = 125000
print(f"{name} has {staff} staff")
# outputs "BT has 125000 staff"