Computer Science (Python)

yield

Token.

The program will print 'Value is Equal to 100'.

When an expression is evaluated, a statement is executed, meaning some action takes place.

Binary Operators are those operators that require two operands to operate upon.

Literals/Constants are values that cannot be changed during the execution of the program.

They are special characters that cannot be typed directly from the keyboard, such as backspace, tabs, and enter, and are represented by escape characters starting with a backslash ().

Rvalues are expressions that come on the right-hand side of an assignment and refer to the values being assigned to a variable.

A group of statements that are executed together, such as functions, conditions, or loops.

The print() function outputs values to the console, automatically inserting spaces between different values by default.

It indicates absence of value.

The << operator is used to shift bits to the left.

Example: x = 100 # numeric type, then x = 'Central Public School' # now x points to string type.

Python will show an error: 'x' not defined.

You can use type(). For example: >>> name = 'amar' >>> type(name) <class 'str'>

a, b, c = 11, 15, 25

A multiline string allows you to store text across multiple lines, using triple quotes or by using backslashes to indicate continuation.

The escape sequence for a new line is '\n'.

A block of code that has a name and can be reused by specifying its name in the program where needed.

The syntax is: variable_name = input('Message to Display')

Python is a high-level, general-purpose, and very popular programming language known for its readability and versatility. It was created by Guido van Rossum and released in 1991. Key features include readable syntax, interpreted language, dynamic typing, versatility, extensive libraries, and cross-platform support.

A statement is a programming instruction that performs an action, such as 'print("Welcome to Python")' or assigning a value to a variable like 'a=100'.

Operators are symbols that perform specific operations when applied on variables.

Every variable must have its own identity, type, and value.

• (Addition), - (Subtraction), * (Multiplication), / (Division), % (Remainder), ** (Exponent), // (Floor Division)

Python supports String Literals, Numeric Literals (which include integer, float, and complex), Boolean Literals, Literal Collection, and Special Literals (like None).

Example: print('Name is', 'amar', 'maurya', sep='&&') outputs 'Name is && amar && maurya'.

print(12 & 7) results in 4.

The is not operator checks if two identities are not the same.

The < operator signifies less than.

Logical OR returns True if at least one of the operands is true.

The value returned by the input() function is always of string type.

'if' is used to create a conditional statement.

It will return 3.

Write a program to enter the radius of the circle and calculate its area.

It will return 7.

Type conversion in Python is the process of converting a value of one data type to another data type. If done by the programmer, it is known as type conversion or type casting; if done automatically by the compiler, it is called implicit type conversion.

An example is 'b=b+20', which assigns a new value to the variable b.

For example, if x = 100 (int) and y = 12.5 (float), assigning y to x will automatically convert x to float: x = y results in x being <type 'float'>.

A complex number is made up of two floating point values, one for the real part and one for the imaginary part.

The >> operator shifts bits to the right.

• (Unary Plus), - (Unary Minus), ~ (Bitwise Complement), Not (Logical Negation)

The letter 'j'.

& (Bitwise AND), ^ (Bitwise XOR), | (Bitwise OR)

Logical AND returns True if both operands are true.

‘ ‘ ‘ This is Multiline Comment’ ’ ’

Integer Literals can be Decimal (e.g., 1234, -50, +100), Octal (starting with 0o, e.g., 0o10 is decimal 8), and Hexadecimal (starting with 0x, e.g., 0xF is decimal 15).

The == operator checks for equality.

The != operator signifies not equal to.

Any digit from 0 to 9 can be part of the identifier, except for the initial letter.

Examples of Fractional Form in Floating Point Literals include 12.0, -15.86, and 0.5, and 10. (which represents 10.0).

import

Tokens or lexical units or lexical elements.

Keywords, Identifiers, Literals, Operators, Punctuators.

Extra space before writing any statement, generally four spaces together mark the next indent level.

An expression is any legal combination of symbols that represent a value, generally a combination of operators and operands.

10 + 25

Comments are additional information in a program that is ignored by the interpreter and not executed.

Python provides functions like int(), float(), str(), and bool() for explicit type conversion.

It represents a horizontal tab.

x = 0; print(x) will avoid the error.

Examples of String Literals include 'Python', '123456', 'Hello, How are you?', '$', '4', and '@@'.

In Python, both single character and multiple characters enclosed in quotes, such as 'AM', 'am', and '*' are treated as the same.

age = 20; print('Your Age is:', age)

We can take input using the built-in function input().

A keyword is a reserved word in a computer language that has a specific meaning and is used to define the syntax or structure of the Python language.

It is created with the def keyword.

No, keywords aren’t allowed to be used as identifiers.

The initial letter of the identifier should be any letter or underscore (_).

The '*=' operator multiplies the variable by the right operand and assigns the result to the variable.

'while' is used to create a while loop.

Identifiers can be as long as you want them to be.

break

The function SeeYou() prints 'This is my Function Definition'.

Dynamic typing means a variable pointing to a value of a certain type can be made to point to a value/object of a different type.

You can change the separator by using the 'sep' parameter in the print() function.

Lvalues are expressions that come on the left-hand side of an assignment and refer to the memory location where a value can be assigned.

Unary operators are those operators that require one operand to operate upon.

The bitwise AND operator (&) performs a binary AND operation on two bits.

The is operator checks if two identities are the same.

#This is Full line comment

area = length * bredth #This is in-line comment

Rvalues refer to the values we assign to a variable, which can appear on the right-hand side of an assignment.

The assignment operator '=' assigns the value on the right to the variable on the left.

You can check the size using the len() function. Example: len('abc') will show the size as 3.

A Hexadecimal Literal in Python starts with 0x, for example, 0xF represents decimal 15.

The Exponent Part consists of two parts: Mantissa and Exponent. For example, 10.5 can be represented as 0.105 x 10^2, where 0.105 is the mantissa and 02 is the exponent.

No, an identifier should not be used as a keyword.

The 'in' operator checks if a variable exists within a sequence.

assert

return

The Python Character Set is a set of valid characters that Python can recognize, including letters (A-Z, a-z), digits (0-9), special symbols (+, -, *, /, etc.), white spaces (blank space, enter, tab), and other characters (all ASCII and UNICODE).

Punctuators or separators.

Variables are defined by assigning a value of the desired type to them.

Yes, a variable declared as a numeric type can be further used to store a string type or another type.

It is an expression that calculates 10% of the salary.

Use x.real for the real part and x.imag for the imaginary part.

No, values cannot come to the left of an assignment; the left-hand side must be a memory location.

The > operator signifies greater than.

Python determines the size of a string as the count of characters in the string.

def drawline(): print(“-”*40) print(“It is Designed by Class 11”) drawline()

It will return 1.

Write a program to enter length and breadth and calculate the area of the rectangle.

It will return 11.

Write a program to enter distance in feet and convert it into inches.

nonlocal

True

lambda

True and False.

The output will be 200, 300.

You can use the type() function. For example: >>> salary = 100 >>> type(salary) <class 'int'>

The default separator used by print() is a space (' ').

Comments in Python begin with the '#' symbol.

A String Literal is a collection of characters enclosed in double or single quotes.

Single line strings created using single or double quotes must terminate on the same line and will result in a SyntaxError if not properly terminated.

Output will be: 11, 30, 10

Output will be: 7, 5, 17

The <= operator indicates less than or equal to.

By typing text in triple quotation marks. Example: Name = '''Central Public School'''

The >= operator represents greater than or equal to.

The operator '/=' assigns the quotient of the variable and the right operand back to the variable.

We can convert the input to numeric type using int() or float() function.

Yes, upper and lower case letters have distinct characteristics in Python identifiers.

A Decimal Literal in Python is an Integer Literal that contains at least one digit and does not include a decimal point, such as 1234, -50, or +100.

Except for the underscore (_), an identifier cannot contain any special characters.

Write a program to enter radius and height of a cylinder and calculate its volume.

finally

for

try

in

None

Implicit type conversion in Python occurs when the compiler automatically converts one data type to another, such as when an integer is assigned to a float variable.

An example is A + 10.

A variable is created in Python when you assign a value to it; it is not created in memory until some value is assigned.

<class 'float'>

a = b = c = 50

The three ways to enter comments are Full Line Comment, Inline Comment, and Multiline Comment.

You can use the print() function. For example: print('Welcome')

print(message_to_print[,sep='string',end='string'])

Lvalues refer to the object to which you can assign a value, specifically the memory location.

There are 33 keywords in Python programming language version 3.7.

An Octal Literal in Python starts with the symbol 0o, such as 0o10, which represents decimal 8.

The '-=' operator subtracts the right operand from the variable and assigns the result to the variable.

'as' is used to create an alias.

Write a program to enter Name and marks of 5 subjects, then calculate total and percentage.

No, case matters when it comes to identifier names; they are not the same.

global

class

is

elif

except

A float can be converted to an int in Python using the int() function. For example, int(50.25) results in 50.

In the expression x = 100, 'x' is an Lvalue and '100' is an Rvalue.

No, the expression '100 = x' is invalid because a value cannot be assigned to the left-hand side.

By adding a backslash at the end of a normal single or double quoted string. Example: Name = 'Central Public \ School'

Logical NOT inverts the truth value of the operand.

Floating Point Literals, also known as real literals, are numbers having fractional parts and can be represented in Fractional Form (e.g., 12.0, -15.86) or Exponent Form (e.g., 0.105 x 10^2).

Write a program that takes two numbers as input and prints their sum.

It will return 3.

The '//=' operator performs floor division of the variable by the right operand and assigns the result to the variable.

Write a program to enter temperature in Fahrenheit and convert it into Celsius.

as

continue

del

while

An identifier is a name given to a Class, Function, or Variable in Python that helps distinguish one entity from others.

The '+=' operator adds the right operand to the variable and assigns the result to the variable.

'break' is used to break out of a loop.

The '**=' operator raises the variable to the power of the right operand and assigns the result to the variable.

You can see a list of Python keywords by entering >>> help('keywords') in the Python interpreter.

Examples of invalid identifiers include Grade-Pay, $Amar007, and Roll No.

if

with

The 'not in' operator checks if a variable does not exist within a sequence.

False

not

pass

from

raise

def

else

Examples of valid identifiers include GradePay, File_12_2018, and _ismarried.