Python Basic Concepts

Do You Know?

1)In Python we can get to know, how many number of characters are there in a string?

What is a string =In Python, a string is a sequence of characters enclosed in either single quotes (') or double quotes ("). Strings are used to represent text and can contain letters, numbers, symbols, and whitespace.

So to count that we can write the code

1. name = input("Enter your name : "):

   • This line asks you to type your name and hit Enter. Whatever you type gets saved in a variable called name.

2. len(name):

   • This part counts how many letters are in the name you entered.

3. print("Length of your name is:", len(name)):

   • This line shows a message on the screen that says how many letters are in your name.

So, if you typed "Alice," the program would tell you, "Length of your name is: 5" because "Alice" has 5 letters.

• The code asks the user for their name.It then calculates how many characters are in the entered name.Finally, it prints the length of the name.

2)How can you use Python to count the occurrences of a specific character in a given string?

First, you create a variable and assign a sentence to it. Next, you use a method to count how many times a specific character, like "a", appears in that sentence. Finally, you print the count to see how many times the character occurs. This way, you can find out the frequency of any character in a given string.

4o mini

Python Variables

Variables are containers for storing data values

Variable is a reference to an object stored in a memory

whenever I want to refer or write a variable we will not use double quotes (")

name = "John"

print(name)

output = John

In programming execution is from top to bottom

In python variable can be assigned a new Variable.This can even change the variables type,due to dyanically type.

1. A variable name must start with a letter or the underscore character

2. A variable name cannot start with a number

3. A variable name can only contain alpha-numeric characters and underscores (A-z, 0-9, and _ )

4. Variable names are case-sensitive (age, Age and AGE are three different variables)

A variable name cannot be any of the Python keywords.

Conventions = Use clear names,Add underscore to separate two letters, avoid single letters.

• use snake case = user_name

maintain consistency

ASSIGNING VALUES TO MULTIPLE VARIABLES

f- string

num1 = 10

print(f"My number is {num1}")

output = My number is 10

1
name = input("Enter your name : ")
print("Length of your name is:",len(name))
2
str = "hey users,I am glad to say that you are going to be Successful in life "
print(str.count("a"))
#ans = 5