2.2 - coding techniques

Question 1

how do you ask a user to input something

Answer 1

variable = input(“text “)

Question 2

what is it called to change the type of a variable

Answer 2

casting

Question 3

what are the 4 main types of variable

Answer 3

str - (string) any characters
int - (integer) whole number
float - (floating point) decimals
bool - (boolean) T/F

Question 4

how do you change the type of a variable

Answer 4

variable2 = int(variable1)

Question 5

what is modulus (MOD)

Answer 5

the remainder of dividing two numbers (%)

Question 6

what is the quotient (DIV)

Answer 6

the exact number of times something divides into something else (//)

Question 7

how do you code an exponent

Answer 7

**

Question 8

how do you multiply, divide, add or subtract variables

Answer 8

*, /, +, -

Question 9

what is a string

Answer 9

a set of characters that can include letters, numbers, spaces and special characters

Question 10

what is concatenation

Answer 10

adding two strings together (“variable1” + “variable2”)

Question 11

what is string traversal

Answer 11

locating or making changes to only a certain character or characters rather than the whole string

Question 12

how do you change case

Answer 12

variable.upper or variable.lower

Question 13

how do you find the length of a string

Answer 13

len(variable)

Question 14

how do you create a substring

Answer 14

variable2 = variable1[start:end]

Question 15

what are the six comparisons you can do with a number

Answer 15

==, !=, <, >, <=, >=

Question 16

what is selection

Answer 16

using if, elif and else

Question 17

what is a subprogram (function/procedure)

Answer 17

a piece of code with an identifier that can be called at any point in the code (function has return, procedure doesnt)

Question 18

how do you code a procedure vs a function

Answer 18

def procedurename():
code

procedurename()

def functionname():
code
return variable1

variable2 = functionname()

Question 19

what are the two types of loops and their function

Answer 19

While loop - loops as long as a condition is met
For loop - loops a certain number of times

Question 20

how do you program a while loop

Answer 20

while variable == x:
code

Question 21

how do you program a for loop

Answer 21

for x in variable_list:
code

or

for x in range(1,9)
code

Question 22

how do you stop a loop

Answer 22

break