Something to understand:

The post-increment operator (++ after the variable name) returns the old value of the variable and then increments the variable. So, if x is 5, then the expression x++ evaluates to 5 and has the side effect that x is set to 6.

This one is a bit special:

x = 2; y = 3; z = 4;
System.out.println("Result = "+ z + y++ * x); // output is Result = 46

Note that string concatenation is being used here. It prints Result =, then 4 which is the value of z, then the value of y++ * x which is 6. The 46 is not one number, it is a 4 and a 6 put after each other coming from two expressions.

Answer from Jesper on Stack Overflow
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Scribd
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Java Increment and Decrement Operators | PDF | Integer (Computer Science) | Computer Programming
In the expression 'int a = 5; int b = a++ + ++a - --a + a--;', the operations occur as follows: a++ uses a=5, then increments a to 6; ++a increments a to 7 and uses 7; --a decrements a to 6 and uses 6; a-- uses a=6, then decrements a to 5. Thus, ...
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In the Java programming language, why can the increment (++) and decrement (--) operators not be used on boolean data types?
The increment (++) and decrement (--) operators cannot be used on boolean data types in Java because these operators are meant for numerical arithmetic operations that adjust a value by a single integer (either adding or subtracting 1). Boolean data types represent true or false states without any numerical value that can be incremented or decremented. Therefore, attempting to apply these operators to booleans does not have a logical or meaningful outcome in this context .
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Java Increment and Decrement Operators | PDF | Integer (Computer ...
In a Java program involving multiple operations with increment and decrement operators, how does evaluating an expression like 'int x = 4; System.out.println(--x + x++ + ++x);' help demonstrate operator precedence and associativity?
In the expression 'int x = 4; System.out.println(--x + x++ + ++x);', the evaluation reflects Java's operator precedence and associativity. --x decrements x from 4 to 3, which is used first. Next, x++ uses x as 3 and then increments it to 4. Finally, ++x increments x to 5 and uses it. The expression evaluates as 3 + 3 + 5, resulting in 11. This showcases operators being applied in a specific order according to precedence and associativity rules, critical for determining expression outcomes .
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Java Increment and Decrement Operators | PDF | Integer (Computer ...
How does the order of operations affect the result when multiple increment and decrement operators are used in a single Java expression, such as 'int a = 5; int b = a++ + ++a - --a + a--; System.out.println(b);'?
In the expression 'int a = 5; int b = a++ + ++a - --a + a--;', the operations occur as follows: a++ uses a=5, then increments a to 6; ++a increments a to 7 and uses 7; --a decrements a to 6 and uses 6; a-- uses a=6, then decrements a to 5. Thus, the calculation is 5 (from a++) + 7 (from ++a) - 6 (from --a) + 6 (from a--) = 12. Therefore, 12 is assigned to b, which is subsequently printed .
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Java Increment and Decrement Operators | PDF | Integer (Computer ...
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AlgoCademy
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Increment And Decrement Operators in Java | AlgoCademy
Learn "Increment And Decrement Operators in Java" with our free interactive tutorial. Master this essential concept with step-by-step examples and practice exercises.
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Java Concept Of The Day
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Quiz On Increment And Decrement Operators : i++, ++i, i- -, - -i
July 28, 2023 - Answer : 0 initially, i=0 i = i++ โ€“ โ€“i + ++i โ€“ iโ€“ i = (i is used before increment) โ€“ (i is used after decrement) + (i is used after increment) โ€“ (i is used before decrement) i = 0(i=1) โ€“ 0(i=0) + 1(i=1) โ€“ 1(i=0) i = 0 โ€“ 0 + 1 โ€“ 1 = 0 ... public class IncrementDecrementQuiz { public static void main(String[] args) { boolean b = true; b++; System.out.println(b); } } ... Answer : No. ++ or โ€” canโ€™t be applied to boolean types. Also Read : 110+ Java Interview Programs With Solutions
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University of Hawaii
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1 Increment and Decrement โ—In programming, we often add one or subtract
โ—Java uses the same operator for String concatenation ยท as for addition: + String couple = "Harry " + "and " + "Megan"; โ—Java uses the type of the operators to decide whether ยท to add or concatenate: โ€“ if at least one operator is a string, Java concatenates ยท
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GeeksforGeeks
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Interesting facts about Increment and Decrement operators in Java - GeeksforGeeks
September 11, 2024 - Increment and Decrement Operators can not be applied to boolean. Let us discuss these 4 facts as listed above and do implement them as follows: ... We can apply ++ and -- operator only for variables but not for the constant values. If we are trying to apply ++ and -- operator on the constant value then we will get a compile-time error which we will be seeing in example 1B after the below example as follows: ... // Java program to illustrate Increment // and Decrement Operators // Can be Applied to Variables Only // Main class public class GFG { // main driver method public static void main(String[] args) { int a = 10; int b = ++a; // Printing value inside variable System.out.println(b); } }
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Tutorial Gateway
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Increment and Decrement Operators in Java
March 26, 2025 - The syntax of both increment and decrement operators in Java Programming to prefix or postfix is as shown below. Increment Operator : ++x or x++ Decrement Operator: --x or x-- This example helps to understand the Increment and Decrement Operators ...
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CodeScracker
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Java Increment and Decrement Operator
In Java, the postfix increment operator has the following general form: ... public class PrefixIncrementExample { public static void main(String[] args) { int x = 5; int y = x++; System.out.println("x = " + x); System.out.println("y = " + y); } } ... The prefix decrement operator, of course, ...
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Saylor Academy
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Java Data and Operators: Increment and Decrement Operators | Saylor Academy
The expression k++ is equivalent to the following Java statements: int k; k = k + 1; // Add 1 to k and assign the result back to k ยท The unary ++ operator applies to a single integer operand, in this case to the variable k. It increments k's value by 1 and assigns the result back to k. Preincrement and postincrement It may be used either as a preincrement or a postincrement operator.
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E Computer Notes
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Increment and Decrement Operators in Java Examples - Computer Notes
January 13, 2014 - There are two ways of representing increment and decrement operators. a) as a prefix i.e. operator precedes the operand. Eg. ++ i; โ€“ -j ; b) as a postfix i.e. operator follows the operand. Eg. i- -; j ++; In case of prefix increment operator (Eg.
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Codedamn
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Increment (++) and Decrement (โ€“) Operators in Java Explained
June 25, 2023 - Among these operators are the increment (++) and decrement (โ€“) operators, which are used to increase or decrease the value of a variable by 1. In this blog post, we will discuss these operators in detail and explore their use cases with examples.
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Scribd
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Increment Decrement | PDF | Logic | Computer Science
The document discusses different ... of how each operator is used and the operations they perform. The increment operator increases a variable by 1 while ......
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Programiz
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Increment ++ and Decrement -- Operator as Prefix and Postfix
In this article, you will learn about the increment operator ++ and the decrement operator -- in detail with the help of examples in Java, C, C++ and JavaScript.
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Codefinity
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Learn Increment and Decrement | Loops
In the first for loop, the variable i is initialized to 0, incremented by 1 after each iteration, and the loop executes until i is no longer less than 5. This will output the numbers from 0 to 4. In the second for loop, the variable j is initialized ...
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CodeGym
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Increment and Decrement Unary Operators in Java
The syntax for decrement operator in Java is a pair of negative signs ie; --x; x--; Just like the increment operator, the decrement (--) operator can also be applied before and after the variable. Both will result in the same decrement of 1.
Published ย  December 5, 2024
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Yolasite
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TOPICS 5.1 The Increment and Decrement 5.7 Keeping a Running Total Operators
II This program demonstrates the ++ and -- operators. ... II num starts out with 4. ... II Display the val ue i n num . ... II Use postfix ++ to increment num . ... II Use prefix -- to increment num. ... I will now increment num. ... I will increment nurn again . ... I will now decrement num.
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Increment and Decrement Operators in Java | dummies
July 1, 2025 - If you place an increment or decrement operator before its variable, the operator is applied before the rest of the expression is evaluated. If you place the operator after the variable, the operator is applied after the expression is evaluated.
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TutorialsPoint
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What are the restrictions on increment and decrement operators in java?
July 30, 2019 - You cannot use increment and decrement operators with constants, if you do so, it generates a compile time error. public class ForLoopExample { public static void main(String args[]) { int num = 20; System.out.println(num++); System.out.println(20--); } } ForLoopExample.java:5: error: unexpected type System.out.println(20--); ^ required: variable found: value 1 error