Python Boolean's
Boolean's characterize one of two values: True or False.
Boolean Values
In programming you frequently want to comprehend if an expression is True or False.
You can consider any expression in Python, and get one of two answers, True or False.
When you examine two values, the expression is evaluated and Python returns the Boolean answer:
Example:-
print(10 > 9)
print(10 == 9)
print(10 < 9)
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When you run a situation in an if statement, Python returns True or False:
Example:-
Print a message primarily based on whether or not the situation is True or False:
a = 200
b = 33
if b > a:
print("b is higher than a")
else:
print("b is no longer higher than a")
When you run a situation in an if statement, Python returns True or False:
Example:-
Print a message primarily based on whether or not the situation is True or False:
a = 200
b = 33
if b > a:
print("b is higher than a")
else:
print("b is no longer higher than a")
Evaluate Values and Variables
The bool( ) feature lets in you to consider any value, and provide you True or False in return,
Example:-
Evaluate a string and a number:
print(bool("Hello"))
print(bool(15))
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Example:-
Evaluate two variables:
x = "Hello"
y = 15
print(bool(x))
print(bool(y))
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Most Values are True
- Almost any cost is evaluated to True if it has some kind of content.
- Any string is True, barring empty strings.
- Any quantity is True, barring 0.
- Any list, tuple, set, and dictionary are True, besides empty ones.
Example:-
The following will return True:
bool("abc")
bool(123)
bool(["apple", "cherry", "banana"])
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In fact, there are now not many values that consider to False, besides empty values, such as ( ), [ ], { }, "", the variety 0, and the cost None. And of route the price False evaluates to False.
Example:-
The following will return False:
bool(False)
bool(None)
bool(0)
bool("")
bool(( ))
bool([ ])
bool({ })
Some Values are False
In fact, there are now not many values that consider to False, besides empty values, such as ( ), [ ], { }, "", the variety 0, and the cost None. And of route the price False evaluates to False.
Example:-
The following will return False:
bool(False)
bool(None)
bool(0)
bool("")
bool(( ))
bool([ ])
bool({ })
One greater value, or object in this case, evaluates to False, and that is if you have an object that is made from a type with a __len__ feature that returns zero or False:
Example:-
class myclass( ):
def __len__(self):
return 0
myobj = myclass( )
print(bool(myobj))
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Functions can Return a Boolean
You can create features that returns a Boolean Value:
Example:-
Print the reply of a function:
def myFunction( ) :
return True
print(myFunction( ))
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You can execute code based totally on the Boolean reply of a function:
Example:-
Print "YES!" if the feature returns True, in any other case print "NO!":
def myFunction( ) :
return True
if myFunction():
print("YES!")
else:
print("NO!")
You can execute code based totally on the Boolean reply of a function:
Example:-
Print "YES!" if the feature returns True, in any other case print "NO!":
def myFunction( ) :
return True
if myFunction():
print("YES!")
else:
print("NO!")
Python additionally has many built-in features that return a boolean value, like the isinstance( ) function, which can be used to decide if an object is of a positive facts type:
Example:-
Check if an object is an integer or not:
x = 200
print(isinstance(x, int))
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Python Operators
Python Operators
Operators are used to function operations on variables and values.
In the instance below, we use the + operator to add collectively two values:
Example:-
print(10 + 5)
Python divides the operators in the following groups:
Arithmetic operators are used with numeric values to function frequent mathematical operations:
- Arithmetic operators
- Assignment operators
- Comparison operators
- Logical operators
- Identity operators
- Membership operators
- Bitwise operators
Python Arithmetic Operators
Arithmetic operators are used with numeric values to function frequent mathematical operations:
Operator Name Example Try it
+ Addition x + y Try it
- Subtraction x - y Try it
* Multiplication x * y Try it
/ Division x / y Try it
% Modulus x p.c y Try it
** Exponentiation x ** y Try it
// Floor division x // y Try it
Python Assignment Operators
Assignment operators are used to assign values to variables:
Operator Example Same As Try it
= x = 5 x = 5 Try it
+= x += 3 x = x + 3 Try it
-= x -= 3 x = x - 3 Try it
*= x *= 3 x = x * 3 Try it
/= x /= 3 x = x / 3 Try it
%= x %= 3 x = x % 3 Try it
//= x //= 3 x = x // 3 Try it
**= x **= 3 x = x ** 3 Try it
&= x &= 3 x = x & 3 Try it
|= x |= 3 x = x | 3 Try it
^= x ^= 3 x = x ^ 3 Try it
>>= x >>= 3 x = x >> 3 Try it
<<= x <<= 3 x = x << 3 Try it
Python Comparison Operators
Comparison operators are used to examine two values:
Operator Name Example Try it
Python Logical Operators
Logical operators are used to mix conditional statements:
Operator Description Example Try it
statements are true
the statements is true
returns False if the
result is true
Identity operators are used to examine the objects, no longer if they are equal, however if they are without a doubt the equal object, with the identical reminiscence location:
Python Identity Operators
Identity operators are used to examine the objects, no longer if they are equal, however if they are without a doubt the equal object, with the identical reminiscence location:
Operator Description Example Try it
variables are the equal
object
variables are now not the
equal object
Python Membership Operators
Membership operators are used to check if a sequence is introduced in an object:
Operator Description Example Try it
sequence with the
detailed cost is current
in the object
sequence with the
exact price is no longer
current in
the object
Bitwise operators are used to examine (binary) numbers:
Python Bitwise Operators
Bitwise operators are used to examine (binary) numbers:
Operator Name Description
& AND Sets every bit to 1 if each bits are 1.
| OR Sets every bit to 1 if one of two bits is 1.
^ XOR Sets every bit to 1 if solely one of two bits is 1.
~ NOT Inverts all the bits.
<< Zero fill Shift left by way of pushing zeros in from the proper and
left shift let the leftmost bits fall off.
>> Signed Shift right by using pushing copies of the leftmost bit
right in from the left, and let the rightmost bits fall off.
shift
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