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Table of contents
1.
Introduction
2.
What is the Logical AND operator &&?
3.
Properties of AND operator
3.1.
Binary Operator
3.2.
Short-circuit evaluation
3.3.
Precedence
3.4.
Associativity
4.
Code examples for Logical and operator 
4.1.
Python Code Example
4.2.
Java Code Example
4.3.
C++ code example  
5.
Frequently Asked Questions
5.1.
What is the difference between the “&” and “&&” operators?
5.2.
What is the difference between “and” and &&?
5.3.
Can && operator be used on non-boolean values?
6.
Conclusion
Last Updated: Mar 27, 2024
Easy

Logical AND operator &&

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Introduction

Logical operators are a fundamental part of Computer Programming. They allow us to manipulate and evaluate various conditional and relational expressions. There are many Logical Operators like NOT(!), AND(&&), OR(||) etc. 

Logical AND Operator

The logical And operator && is used to evaluate statements where either of the statements represents a true bool value, but they both must have to be accurate in order for the boolean value of the operation to be true.

Here we are going to discuss the Logical AND operator &&. 

Also see, Duck Number in Java and Hashcode Method in Java.

What is the Logical AND operator &&?

The logical AND operator is a binary operator that operates on binary values of the two statements/variables/numbers provided. It takes boolean expressions and returns a boolean value based on whether both statements are true.

The symbol for this Logical Operator is “&&,” and this operator returns true if and only if both the statements are true. If either of the statements is false, then the operand returns a false bool value.

Here is a table to show the various cases and what is the output of the cases using && operator: 

 A

B

A&&B

0

0

0

0

1

0

1

0

0

1

1

1

Also see, Swap Function in Java

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Properties of AND operator

Binary Operator

The "and" operator is a binary operator, which means it requires two operands to work.

Short-circuit evaluation

The "and" operator has a short-circuit evaluation behavior. This means that if the left operand is false, the right operand will not be evaluated. This is because the overall expression will always be false, regardless of the value of the right operand.

Precedence

The "and" operator has higher precedence than the "or" operator. This means that expressions with both "and" and "or" operators will be evaluated with the "and" operator first unless parentheses are used to specify a different order of evaluation.

Associativity

The "and" operator is left-associative, which means that it is evaluated from left to right. For example, in the expression, A and B and C, the "and" operator is first evaluated between A and B, then between the result and C.

Code examples for Logical and operator 

Python Code Example

Here we are going to see a Python code example to show the implementation of an operator.

//python code to show logical and implementation
a=9
b=14
if a>5 && b<15:
    print(“this statement is true “)


Output 

this statement is true 

Java Code Example

Here we are going to see a Java code example to show the usage of AND operator.

//Java code example for logical and implementation
int a=2;
int b=7;
if(a>3 && b<6){
         System.out.println(“Both conditions are true”);
}
/*the above if condition is false because both the expressions are not true as a<3 so false &&true ==false due to which the else statement is executed in this case*/
else{
        System.out. println(“One or Both are False”);
}


Output 

One or Both are False 

C++ code example  

 Here we are going to see a Java code example to show the usage of AND operator.

//C++ code example for logical and implementation
int a=22;
int b=10;
if(a>12 && b<12){
    cout<<” Both statements are true”;
}
else{
   cout<<” Either or both statements are false”;
}
/* the above statement will return true, and the cout statement will get executed because both the statements are true, as a>12 and b<12 also.*/


Output  

Both statement are true 

Frequently Asked Questions

What is the difference between the “&” and “&&” operators?

The & operator is a logical as well as a bitwise operator, it can work on both boolean as well bitwise data. The && operator, on the other hand, is purely logical, the operator means it can work only on boolean data. So & is bitwise, and && is logical and operator.

What is the difference between “and” and &&?

There is no difference between them, they are just two ways to represent the logic and operator .” and” is a keyword, while “&&” is a symbol.

Can && operator be used on non-boolean values?

Although it is possible to use the && operator on non-boolean values by overloading in some languages, it is generally not recommended to use it in this way because it makes the code hard to understand and also reduces code readability.

Conclusion

The logical and operator && is a very useful tool in today’s programming world. It provides a short and concise way of evaluating expressions and helps us in writing control flow statements. After reading the above article, you should have full confidence in your knowledge about this operator, want to know about the other operators and other programming stuff, no worries, Coding Ninjas has you covered.

Refer Logical-Operators, Operators links to know more about operators.

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