Run this command to install MySQL server, as well as the packages for the client and for the database common file:
sudo apt-get install mysql-server
NOTE: A dialog pops up for an optional root user password. (I advice you provide one).
Run the following commands:
| first_name = "Samuel" | |
| surname = "Mensah" | |
| # Positional placeholders using %s | |
| print("Hello %s %s" %(first_name, surname)) # Results: Hello Samuel Mensah | |
| # Named positional placeholders using %(name)s | |
| print("Hello %(first_name)s %(surname)s") # Result: Hello Samuel Mensah |
| """ | |
| Algorithm to find the sum of N numbers | |
| Steps | |
| 1. Start | |
| 2. Declare and assigned variables, i=0, sum=0, N | |
| 3. Enter how many numbers you want to find their sum (N) | |
| 4. Enter number (num) | |
| 5. Add number(num) to sum ie sum = sum + num | |
| 6. Increase i by 1 ie i = i + 1 |
| f '<text> { <expression> <optional !s, !r, or !a> <optional : format specifier> } <text> ...' |
| # Examples of f-string | |
| first_name = "Felix" | |
| surname = "Otoo" | |
| print(f"Hello, I am {first_name} {surname}") # Result: Hello, I am Felix Otoo |
| # Let starts with defining some variables | |
| first_name = "Felix" | |
| middle_name = "Albert" | |
| last_name = "Otoo" | |
| age = 28 | |
| profession = "Software Engineer" | |
| # % formatting string | |
| # Ex. 1 Using position placeholders | |
| print("This is %s %s %s. He is %s years old. He is a %s" %(first_name, middle_name, last_name, age, profession)) |
| # Concatenation involving Str.format() strings | |
| first_name = "Felix" | |
| last_name = "Otoo | |
| profession = "Software Engineer" | |
| str_1 = "This is {first_name} {last_name}. ".format(first_name=first_name, last_name=last_name) | |
| str_2 = "He is a {profession}. ".format(profession=profession) | |
| str_3 = "He is from Ghana" | |
| # Concatenating str_1, str_2 and str_3 using the plus(+) sign |
| # Concatenation involving %-formatting strings | |
| str_1 = "This is %s %s" %(first_name, last_name) | |
| str_2 = "He is a %s. " % (profession) | |
| str_3 = "He is from Ghana" | |
| # Concatenating str_1, str_2 and str_3 using the plus(+) sign | |
| str_4 = str_1 + str2 + str_3 | |
| print(str_4) # Result: This is Felix Otoo. He is a Software Engineer. He is from Ghana" |
| # Concatenation involving f-strings | |
| # | |
| # Unlike %-formatting and Str.format() examples above, we do not | |
| # need the plus(+) sign | |
| # or even evaluating and resolving final literal strings before | |
| # joining them together | |
| # We can achieve all of that with the f literal string. | |
| str_1 = f"This is {first_name} {last_name}" f"He is a {profession}. " "He is from Ghana" | |
| print(str_1) # Result: This is Felix Otoo. He is a Software Engineer. He is from Ghana" |
| # This concatenates two f-strings | |
| # 1st string f"This is {first_name} {last_name} | |
| # 2nd string f"He is a {profession}" | |
| print(f"This is {first_name} {last_name}. " f"He is a {profession}") # Result: This is Felix Otoo. He is a Software Engineer |