L O A D I N G ## Lecture Notes – I

`text1 = 'Hello' \        'World'text2 = "hi there"text3 = '''How are youwhere are youwhat do you want?'''text4 = """I am fine"""#I am just trying to run few programsprint(text1,end=' ')  #printing first text  print("Hello")print(text2)print(text3)print(text4)'''this is a multi line textplease ignore'''print(type(True))cost = 60quantity = 212total_cost = cost * quantityprint("Cost of each pen is \$",cost,"so for ",quantity,"pens, its going to be \$",total_cost)print(f"Cost of each pen is \$ {cost} so for  {quantity} pens, its going to be \$ {total_cost}")print("Hellon\nhow are you?\nI am fine")`
`txt1 = "Hello"a1 = 5b1 = False#user input- will provide the valueinp1 = input("Enter your name:")print(inp1)inp2 = int(input("Enter your age:"))print(type(inp2))print(inp2)num1 = 10num2 = 20#ArithmeticOperationsprint(num1 + num2)print(num1 - num2)print(num1 * num2)print(num1 / num2)print(num1 // num2)  #integer division - ignores the decimal partprint(num1 ** num2)  #power - exponentprint(num1 % num2)   #mod (modulus) - remainder#Comparison operators:   <  >   <=   >=   ==  !=#          :input is anything but output is always bool value#Logical operations:  and  or not#          :both input and output are bool value`
`#comparison operators - output is always Bool##  >  <  >=  <=  ==  !=num1 = 56num2 = 56num3 = 57print(num1 <= num2) # less than or equal - Tprint(num1 <= num3) # Tprint(num1 < num2) # Fprint(num1 >= num2)  #Tprint(num1 > num2) #Fprint(num1 > num3) #Fprint(num1 == num2)  #Tprint(num1 != num2) #F#Logical operators# Today we will do operators and conditions# I do only operators## Today we will do operators or conditions# I do only operators# and or notnum1 = 56num2 = 56num3 = 57print(num1 <= num2 and num1 <= num3 or num1 < num2 and num1 >= num2 or num1 > num2 and num1 > num3 or num1 == num2 and num1 != num2)#T#print()num1 = int(input("Enter a number: "))print(type(num1))## 1. Calculate area and perimeter of a rectangle with given sides# 2. Calculate area and circumference of a circle with radius as input from the user#conditional statementsnum1        = -56#ask you is it a positive number ?if num1>0:    print("hello")    print("Yes its positive")elif num1 <0:    print("Its negative")else:    print("Its neither positive nor negative")avg = 76'''avg>85 : Grade Aavg>70: Grade B:avg >60: Grade Cavg >40: Grade D<40: Grade E'''if avg >=85:    print("Grade A")    if avg >= 90:        print("You win special certificate")        if avg>95:            print("You get President's meddal")elif avg>70:    print("Grade B")elif avg>60:    print("Grade C")elif avg>40:    print("Grade D")else:    print("Grade E")#get input of 3 numbers and find the largest and the smallest number#loops - Keep repeating# FOR   - when you know how many times# WHILE - untill the condition is true#range(a,b,c): start = a, go upto b (excluding), c = increment#range(3,19,4) = 3, 7, 11,15,##range(3,9) (increment by default 1) - 3, 4,5,6,7,8## range(4) (by default start=0, increment = 1)- 0,1,2,3for i in range(5):    print("*",end=" ")print("\n --------------  \n\n")'''* * * * * * * * * * * * * * * * * * * * * * * * * '''for j in range(5):    for i in range(5):        print("*",end=" ")    print()`
`print("\n --------------  \n\n")'''* * * * * * * * * * * * * * * * * * * * * * * * * '''for j in range(5):    for i in range(5):        print("*",end=" ")    print()print("\n --------------  \n\n")'''* * * * * * * * * * * * * * * '''for j in range(5):    for i in range(j+1):        print("*",end=" ")    print()print("\n --------------  \n\n")'''* * * * * * * * ** * ** ** '''for j in range(5):    for i in range(5-j):        print("*",end=" ")    print()print("\n --------------  \n\n")'''* * * * *  * * * *  * * *   * *    * '''for j in range(5):    for i in range(j):        print("",end=" ")    for i in range(5-j):        print("*",end=" ")    print()'''   *  *  * * ** **      *'''sum=0while True:    num1 = int(input("Enter a number (-999 to stop):"))    if num1==-999:        break  #throw us out of the current loop    sum+=num1print("Sum of the given numbers are: ",sum)## check if prime numberwhile True:    num1 = int(input("Enter a number (0 to stop/negative numbers not allowed): "))    if num1 == 0:        break    if num1<0:        print("Invalid number")        continue    isPrime = True    for i in range(2,num1//2+1):        if num1 % i==0:            isPrime=False            break    if isPrime:        print(f"{num1} is a Prime number")    else:        print(f"{num1} is not a Prime number")## generate if prime numbernum1=0while True:    #num1 = int(input("Enter a number (0 to stop/negative numbers not allowed): "))    num1+=1    if num1 == 0:        break    if num1<0:        print("Invalid number")        continue    isPrime = True    for i in range(2,num1//2+1):        if num1 % i==0:            isPrime=False            break    if isPrime:        print(f"{num1}")        ch=bool(input())        if ch!=False:            break#read the marks of 5 subjects and print total and averagetotal = 0while True:    for i in range(5):        marks = int(input("Enter the marks in subject "+str(i+1)+": "))        total+=marks    print(f"Total marks is {total} and average is {total/5:.2f}")    ch=bool(input())    if ch:        break`
`### Enter marks for 5 subjects for as long as user wants to repeatwhile True:    sum = 0    for i in range(5):        marks = int(input("Enter your marks in subject "+str(i+1)+": "))        sum+=marks    print("Total marks obtained = ",sum)    ch=bool(input("Enter any key to stop:"))    #converting empty string to bool will result in    # False, anything will result in True    if ch:        break############################str1 = 'HELLO'str2 = "I am fine"str3 = '''Where are you going?How long will you be here?What are you going to do?'''str4 = """I am hereI will be here for next 7 daysI am going to just relax and chill"""print(type(str1),type(str2),type(str3),type(str4))print(str1)print(str2)print(str3)print(str4)# What's you name?str5 = "What's your name?"print(str5)#He asked,"Where are you?"str6 = 'He asked,"Where are you?"'print(str6)#He asked,"What's your name?"#escape sequence  \print('''He asked,"What's your name?"''')print("He asked,\"What's your name?\"")print('nnnnn\nnn\tnn')print("\FOlder\\newfolder")# \n is used to print newline in pythonprint("\\n is used to print newline in python")# \\n will not print newline in pythonprint("\\\\n will not print newline in python")str1 = "Hello You"str2 = "There"print(str1 + str2)print(str1 *5)for i in str1:    print("Hello")#indexingprint(str1)print("last element: ",str1)print("last element: ",str1[-1])print("second element: ",str1[-8])print("ell: ",str1[1:4])print("ell: ",str1[-8:-5])print("First 3: ",str1[:3])print("First 3: ",str1[:-6])print("Last 3: ",str1[6:])print("Last 3: ",str1[-3:])`
`#Methods - exactly same as your functions - only difference is they are linked to a classimport timestr1 = "HELLO"print(str1.replace("L","X",1))sub_str = "LL"str2 = "HELLO HOW WELL ARE YOU LL"cnt = str2.find(sub_str)print("Count = ",cnt)if cnt<0:    print("Sorry, no matching value hence removing")else:    print("Value found, now replacing")    for i in range(5):        print(". ",end="")        time.sleep(0.5)    print("\n")    print(str2.replace(sub_str,"OOOO"))out_res = str2.split("LL")print("Output Result = ",out_res)out_str = "LL".join(out_res)print(out_str)print(str2.title())print(str2.lower())print(str2.upper())str3 = 'hello how well are you ll'print(str3.islower())print(str3.isupper())num1 = input("Enter a number: ")if num1.isdigit():    num1 = int(num1)else:    print("Invaid input")ename = input("Enter your first name: ")if ename.isalpha():    print("Your name is being saved...")else:    print("Invaid name")#WAP to count of vowels in a sentencepara1 = "Work, family, and endless to-do lists can make it tough to find the time to catch up. But you'll never regret taking a break to chat with your friend, Frost reminds us. Everything else will still be there later."sum=0for l in para1:    if l=='a' or l=='A' or l=='e' or l=='E' or l=='i' or l=='I' or l=='o' or l=='O' or l=='u' or l=='3':        sum+=1print("Total vowesl = ",sum)sum=0for l in para1.lower():    if l=='a' or l=='e'  or l=='i' or l=='o' or l=='u':        sum+=1print("Total vowesl = ",sum)sum=0for l in para1.lower():    if l in 'aeiou':        sum+=1print("Total vowesl = ",sum)##########  LIST#LIST#collection of linear ordered itemslist1 = [1,2,3,4,5]print(type(list1))print("Size = ",len(list1))print(list1)print(list1[-1])print(list1)print(list1[:3])print(list1[-3:])print(list1[1:4])for i in list1:    print(i)print([2,3,4]+[6,4,9])print([2,3,4]*3)str2 = "A B C D A  B C A B A "print(str2.count("D"))print(list1.count(3))`