operatorsinpython-18112209560fddrfre4.pptx

operatorsinpython-18112209560fddrfre4.pptx

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  V.M.Prabhakaran, Department Of Cse, KIT-Coimbatore Problem Solving and Python Programming 1
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  OPERATORS Problem Solving andPython Programming 2 • An operator is a symbol that represents an operations that may be performed on one or more operands. • An operand is a value that a given operator is applied to. • Example: 4+(3*k) +, * are operator and 4,3,k are operands
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  Different forms ofoperator Problem Solving and Python Programming 3 • Unary Operator: – Unary arithmetic operators perform mathematical operations on one operand only. The „+‟ and „-„‟ are two unary operators. – Example: >>> x = -5 #Negates the value of X >>> x -5 • Binary operator: – A Binary operator operates on two operands – Example: >>> 3 + 10 >>>13 >>> 10 – 7 >>> 3
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  Types of Operators ProblemSolving and Python Programming 4 1. Arithmetic operator 2. Relational operator 3. Logical operator 4. Bitwise operator 5. Assignment operator 6. Special operator
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  1. Arithmetic operator ProblemSolving and Python Programming 5 • Arithmetic operators are basic mathematical operations. Operator Meaning Example Result + Addition C=12+1 C=13 - Subtraction C=12-1 C=11 * Multiplication C=12*1 C=12 / Division C=12/1 C=12 // Floor division C=12//10 1 % Modulus C=12%10 C=2 ** Exponentiation C=10**2 C=100
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  Example of ArithmeticOperator print("Arithmetic Operator") a=10 b=5 print("Addition:",a+b) print("Subtraction:",a-b) print("Multiplication:",a*b) print("Division:",a/b) print("Floor Division:",a//b) print("Modulus:",a%b) print("Exponent",a**b) Output: Problem Solving and Python Programming 6
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  2. Relational operator ProblemSolving and Python Programming 7 • Relational operators are also called as Comparison operators • It is used to compare values. • It either returns True or False according to condition. Operator Meaning Example Result > Greater than 5>6 False < Less than 5<6 True == Equal to 5==6 False != Not equal to 5!=6 True >= Greater than or equal to 5>=6 False <= Less than or equal to 5<=6 True
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  Example of RelationalOperator print("Relational Operator") a=10 b=5 print(a>b) print(a<b) print(a==b) print(a!=b) print(a>=b) print(a<=b) Output: Problem Solving and Python Programming 8
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  3. Logical operator ProblemSolving and Python Programming 9 • Logical operator are typically used with Boolean(logical) values. • They allow a program to make a decision based on multiple condition. Operator Meaning Example Result and True if both the operands are true 10<5 and 10<20 False or True if either of the operands is true 10<5 or 10<20 True not True if operands is false ( complements the operand) not (10<20) False
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  Example of LogicalOperator Problem Solving and Python Programming 10 Logical Operator False True False print("Logical Operator") print(10<5 and 10<20) print(10<5 or 10<20) print(not(10<20)) Output:
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  4. Bitwise operator ProblemSolving and Python Programming 11 • Bitwise operators act on operands as if they are string of binary digits. • It operates bit by bit. Operator Meaning Example & Bitwise AND a & b | Bitwise OR a | b ~ Bitwise NOT a ~ b ^ Bitwise XOR a ^ b >> Bitwise right shift a >> 2 << Bitwise left shift a << 2
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  5. Assignment operator ProblemSolving and Python Programming 12 • Assignment operators are used to assign values to variables. Operator Meaning Example = Assign a value a=5 += Adds and assign the result to the variable a+=1 (a=a+1) -= Subtracts and assign the result to the variable a-=1 (a=a-1) *= Multiplies and assign the result to the variable a*=5 (a=a*5) /= Division and assign the result to the variable a/= (a=a/5) //= Floor division and assign the result to the variable a//=5(a=a//5) %= Find modulus and assign the result to the variable a%=5 (a=a%5) **= Find Exponentiation and assign the result to the variable a**=5 (a=a**5)
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  Operator Meaning Example &=Find Bitwise AND and assign the result to the variable a&=5(a=a&5) |= Find Bitwise OR and assign the result to the variable a|=5(a=a|5) ^= Find Bitwise XOR and assign the result to the variable a^=5(a=a^5) >>= Find Bitwise right shift and assign the result to the variable a>>=5 (a=a>>5) <<= Find Bitwise left shift and assign the result to the variable a<<=5 (a=a<<5) Problem Solving and Python Programming 13
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  6. Special operator ProblemSolving and Python Programming 14 • Python offers some special operators like identity operator and the membership operator. • Identity Operator: – is and is not are the identity operator Operator Meaning Example is True if the operands are identical a is true is not True if the operands are not identical a is not true
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  Example of IdentityOperator Problem Solving and Python Programming 15 a1=5 b1=5 a2="Hello" b2="Hello" a3=[1,2,3] b3=[1,2,3] print(a1 is not b1) print(a2 is b2) print(a2 is b3) Output: False True False
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  • Membership Operators: –in and not in are the membership operators. Problem Solving and Python Programming 16 Operator Meaning Example in True if value/ variable is found in the sequence 5 in a not in True if value/ variable is not found in the sequence 5 not in a
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  Example of MembershipOperator Problem Solving and Python Programming 17 a="Hello world" b={1,"a","b",2} print("H" in a) print("hello" in a ) print(1 in b) print("b" in b) Print(“c” not in b) Output: True False True True True