1. How to Create a String. String literals are written by enclosing a sequence of characters in a single quote ('Hello'), double quotes (“Hello”), or triple quotes ('''Hello''').Strings in Python possess a unique built-in operator that is % operator. This % Operator, also known as Modulo or Interpolation Operator, helps you do simple positional formatting in strings. This is the oldest method used for string formatting, also known as C-Style String Formatting.Strings are Arrays
Like many other popular programming languages, strings in Python are arrays of bytes representing unicode characters. However, Python does not have a character data type, a single character is simply a string with a length of 1. Square brackets can be used to access elements of the string.
What does str () do in Python : The str() function converts values to a string form so they can be combined with other strings. The "print" function normally prints out one or more python items followed by a newline.
How can we write string
Creating Strings
The most direct way to create a string is to write: String greeting = "Hello world!"; In this case, "Hello world!" is a string literal—a series of characters in your code that is enclosed in double quotes.
How do you store strings in Python : To store a string inside a variable, we need to assign a variable to a string. In this case let's declare my_str as our variable: my_str = "Sammy likes declaring strings." Sammy likes declaring strings.
It uses Template class from string module. It has a syntax somewhat similar to . format() when done with keywords, but instead of curly braces to define the placeholder, it utilises a dollar sign ($). ${} is also valid and should be in place when a valid string comes after the placeholder.
How to Format Strings in Python
- Formatting with % Operator.
- Formatting with format() string method.
- Formatting with string literals, called f-strings.
- Formatting with String Template Class.
- Formatting with center() string method.
How do you declare a string variable in Python
Declare a string variable
Assign a string value to the variable and it will become a string variable. In Python, the string value cane be assigned in single quotes or double quotes.To store a string inside a variable, we need to assign a variable to a string. In this case let's declare my_str as our variable: my_str = "Sammy likes declaring strings." Sammy likes declaring strings.Hi, Using the str() function converts the data type from an int or float to a string. The output on the console is the same but to see the difference, you should try performing some math operations on the two types: i.e. pi = 3.14 print pi + pi #This outputs, “6.28” (the sum of pi + pi).
the equality operator
The “==” operator is known as the equality operator. The operator will return “true” if both the operands are equal. However, it should not be confused with the “=” operator or the “is” operator. “=” works as an assignment operator. It assigns values to the variables.
What is string examples : A string is a sequence of characters enclosed between the double quotes "…" Example: "abc123" "Hello World" "Hello, what is your name "
How is a string stored : Strings are stored in memory as a sequence of characters, each character occupying a specific memory location. In more detail, a string is a data type used in programming, such as an integer and floating point unit, but is used to represent text rather than numbers.
How can we store string
Storage for Strings in C
- Strings as character arrays.
- Strings using character pointers. Using character pointer strings can be stored in two ways:
- 1) Read only string in a shared segment.
- 2) Dynamically allocated in heap segment.
- Example 1 (Try to modify string)
- Example 2 (Try to return string from a function)
- Example:
$identifier names a substitution placeholder matching a mapping key of "identifier" . By default, "identifier" must spell a Python identifier. The first non-identifier character after the $ character terminates this placeholder specification. ${identifier} is equivalent to $identifier.The python format() method will return a formatted value as specified by the format passed as a parameter. The python format() method is an effective way of converting and organizing values. Also, formatting makes the code look more presentable and readable.
How do you write a variable to a string : To add a variable to a string, you can use string concatenation or string interpolation. let name = "John"; let greeting = "Hello " + name + "!"; console. log(greeting); // Output: "Hello John!" let name = "John"; let greeting = `Hello ${name}!`; console.