What is a procedure?
A procedure is a named group of code that has paramaters and return values. Procedures are known as methods or functions depending on the language.
A procedure executes the statements within it on the parameters to provide a return value.
What are parameters?
Paramaters are input values of a procedure that are specified by arguments.Arguments specify the values of the parameters when a procedure is called.
By creating theses algorithms the readibility of code increases and the complexity decreases. This is becasue a function’s name can tell the reader what action it will perform, and by calling it, the code becomes more clean and easy to understand.
Procedures are used to create algorthims that can perform certain actions or return values. When a procedure returns a value, theis information must be stored in a variable for later use. However some procedures like the MOVE_FORWARD() perform an action, and don’t return a value. The image above provides an example of where procedures that don’t output a value would be used.
A 60$ item recieves a 20% discount and taxed at 8%.
PROCEDURE applyDiscount(cost, percentDiscounted)
{
temp ← 100 - percentDiscounted
temp← temp/ 100
cost ← cost *temp
RETURN(cost)
}
price ← applyDiscount(60, 20)
This is how we get the final price with the discount by calling the procedure and assigning it to the price variable.
PROCEDURE applyTax(cost, percentTaxed)
{
temp ← 100 + percentTaxed
temp← temp/ 100
cost ← cost *temp
RETURN(cost)
}
price ← applyTax(price, 8)
This applys the 8% tax to the price determined after the discount.
Given the applyTax procedure above: How would you call the procedure to get it to find the price using cost = 50, and percentTaxed = 10, and what value will it return?
applyTax(50, 10)
# Defining Functions
#
# def function_name(parameter1, parameter2, etc..):
# code here...
#
# return return_value;
# return the value of parameter1 plus parameter2;
def add(parameter1, parameter2): # creates a function that takes in two parameters
solution = parameter1 + parameter2; # sets solution to the sum of parameter1 and parameter2
return solution; # return solution
print(add(5, 5)); # prints the return value of add(5,5)
def subtract(parameter1, parameter2):
solution = parameter1 - parameter2;
return solution;
print(add(5, 5))
10
# Defining Classes
class person:
def __init__(self, name, age, ): # constructor
self.name = name;
self.age = age;
def getName(self): # method to create get name
return self.name;
def getAge(self): # method to create get age
return self.age;
def setName(self, name): # method to create set name
self.name = name;
def setAge(self, age): # method to create set age
self.age = age;
def yearOlder(self): # method to increment age by 1
self.age += 1;
def __str__(self): # method that returns a string when the object is printed
return (f"My name is {self.name} and I am {self.age} years old.")
Person1 = person("John Doe", 15);
print(Person1)
print(Person1);
My name is John Doe and I am 15 years old.
My name is John Doe and I am 15 years old.
class car:
def __init__(self, model, name, price):
self.model = model
self.name = name
self.price = price
def getModel(self):
return self.model
def getname(self):
return self.name
def getprice(self):
return self.price
def setName(self, name):
self.name = name;
def setAge(self, age):
self.age = age;
def yearOlder(self):
self.age += 1;
def __str__(self):
return (f"My name is {self.name} and I am {self.age} years old.")
car1 = car("Honda Civic" , "Model Year: "2018 , "Price: "13,000)
print(Person1)
UPDATED HW assignment 1: Create a function that takes in an array as the parameter and returns the array of distinct values. DON’T USE SETS. TEST ARRAY: arr1 = [2,1,3,2,0,2,0,0,4,2,0,0,0,2,0,0,1,2,3,0,7,4,5,2,1,2,3,4,6].
def get_distinct_values(arr):
distinct_values = []
for item in arr:
if item not in distinct_values:
distinct_values.append(item)
return distinct_values
# Test the function with the given array
arr1 = [2, 1, 3, 2, 0, 2, 0, 0, 4, 2, 0, 0, 0, 2, 0, 0, 1, 2, 3, 0, 7, 4, 5, 2, 1, 2, 3, 4, 6]
result = get_distinct_values(arr1)
print(result)
[2, 1, 3, 0, 4, 7, 5, 6]
class student:
def __init__(self, email, name, grade):
self.email = email
self.name = name
self.grade = grade
def getEmail(self):
return self.email
def getName(self):
return self.name
def getGrade(self):
return self.grade
def setEmail(self, email):
self.email = email
def setName(self, name):
self.name = name
def setGrade(self, grade):
self.grade = grade
def __str__(self):
return (f"My name is {self.name} My email is {self.email} My grade is {self.grade}")
student1 = student("aaronhsu960521@gmail.com", "Aaron", "A")
student2 = student("kumeshsd@gmail.com", "Eshaan", "B")
student3 = student("ninaadkiran@gmail.com", "Ninaad", "F")
print(student1)
print(student2)
print(student3)
My name is Aaron My email is aaronhsu960521@gmail.com My grade is A
My name is Eshaan My email is kumeshsd@gmail.com My grade is B
My name is Ninaad My email is ninaadkiran@gmail.com My grade is F