## Integer division java

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But is there another way to get the correct double result? I don't like casting primitives, who knows what may happen. That avoids a cast. But you'll find that the cast conversions are well-defined. You don't have to guess, just check the JLS. Widening primitive conversions do not lose information about the overall magnitude of a numeric value. Conversion of an int or a long value to float, or of a long value to double, may result in loss of precision-that is, the result may lose some of the least significant bits of the value.

Why do you have an irrational fear of casting primitives? Nothing bad will happen when you cast an int to a double. If you're just not sure of how it works, look it up in the Java Language Specification. Casting an int to double is a widening primitive conversion. You can get rid of the extra pair of parentheses by casting the denominator instead of the numerator:. If you change the type of one the variables you have to remember to sneak in a double again if your formula changes, because if this variable stops being part of the calculation the result is messed up.

I make a habit of casting within the calculation, and add a comment next to it. Otherwise integer Math is always preferred. Producing a double from integer division- there is no other way without casting may be you will not do it explicitly but it will happen. Now, there are several ways we can try to get precise double value where num and denom are int type, and of-course with casting.

This allows you to look up just once whether the cast does exactly what you want. This method could also be subject to tests, to ensure that it continues to do what you want. It also doesn't matter what trick you use to cause the division you could use any of the answers hereas long as it results in the correct result. Anywhere you need to divide two integers, you can now just call Utils::divide and trust that it does the right thing.

Learn more. Integer division: How do you produce a double? Ask Question. Asked 9 years, 9 months ago. Active 2 years, 8 months ago. Viewed k times.The java. BigInteger class internally uses array of integers for processing, the operation on object of BigIntegers are not as fast as on primitives. This method performs an operation upon the current BigInteger by which this method is called and BigInteger passed as the parameter. Parameters: This method accepts a parameter val which is the value that divides this BigInteger.

Exception: The parameter val must not be 0 otherwise Arithmetic Exception is thrown. If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute. See your article appearing on the GeeksforGeeks main page and help other Geeks. Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below. Writing code in comment? Please use ide. Which Java libraries are useful for competitive programming?

Program to check if a String in Java contains only whitespaces In Java, Can we call the main method of a class from another class?

BigInteger div. BigInteger a. BigInteger b. Output: The division of by is Output: The division of by is 21 Using double result is Output: java. ArithmeticException: BigInteger divide by zero.

Check out this Author's contributed articles. Load Comments.In integer division and modulusthe dividend is divided by the divisor into an integer quotient and a remainder. The integer quotient operation is referred to as integer division, and the integer remainder operation is the modulus. By the time we reach adulthood, we normally think of division as resulting in an answer that might have a fractional part a floating-point data type.

Because both operands are of the integer data type the evaluation of the expression or answer would be 2 with no fractional part it gets thrown away.

In the real world of data manipulation there are some things that are always handled in whole units or numbers integer data type. To illustrate our example: I have 11 dollar coins to distribute equally to my 4 children. How many do they each get?

The answer is 2, with me still having 3 left over or with 3 still remaining in my hand. The dollar coins are not divisible into fractional pieces.

Using an axe and chopping the 3 remaining coins into pieces of eight. If you do think this way, I will change my example to cans of tomato soup.

Better yet, living things like puppy dogs. Many compilers require that you have integer operands on both sides of the modulus operator or you will get a compiler error. In other words, it does not make sense to use the modulus operator with floating-point operands.

How many times can you divide 24 into 6? Six divided by 24 is zero. This is different from: What is the remainder of 6 divided by 24?

Six, the remainder part is given by modulus.

Skip to content Overview In integer division and modulusthe dividend is divided by the divisor into an integer quotient and a remainder. Integer division as learned in grade school. References cnx. Previous: Arithmetic Operators. Next: Unary Operations. Share This Book Share on Twitter.Java provides a rich set of operators to manipulate variables. Arithmetic operators are used in mathematical expressions in the same way that they are used in algebra. Java defines several bitwise operators, which can be applied to the integer types, long, int, short, char, and byte.

Bitwise operator works on bits and performs bit-by-bit operation. Conditional operator is also known as the ternary operator. This operator consists of three operands and is used to evaluate Boolean expressions.

The goal of the operator is to decide, which value should be assigned to the variable.

### Type Casting Is The Only Way

This operator is used only for object reference variables. The operator checks whether the object is of a particular type class type or interface type. This operator will still return true, if the object being compared is the assignment compatible with the type on the right.

Operator precedence determines the grouping of terms in an expression. This affects how an expression is evaluated. Here, operators with the highest precedence appear at the top of the table, those with the lowest appear at the bottom. Within an expression, higher precedence operators will be evaluated first. The next chapter will explain about loop control in Java programming. The chapter will describe various types of loops and how these loops can be used in Java program development and for what purposes they are being used.

Java - Basic Operators Advertisements.

## Java - Basic Operators

Previous Page. Next Page. Live Demo. Previous Page Print Page. Checks if the values of two operands are equal or not, if values are not equal then condition becomes true. Checks if the value of left operand is greater than the value of right operand, if yes then condition becomes true. Checks if the value of left operand is less than the value of right operand, if yes then condition becomes true.

Checks if the value of left operand is greater than or equal to the value of right operand, if yes then condition becomes true. Checks if the value of left operand is less than or equal to the value of right operand, if yes then condition becomes true.

Binary AND Operator copies a bit to the result if it exists in both operands. Binary XOR Operator copies the bit if it is set in one operand but not both. Binary Ones Complement Operator is unary and has the effect of 'flipping' bits. Binary Left Shift Operator.In addition, this class provides several methods for converting an int to a String and a String to an intas well as other constants and methods useful when dealing with an int.

Implementation note: The implementations of the "bit twiddling" methods such as highestOneBit and numberOfTrailingZeros are based on material from Henry S.

Warren, Jr. Since: JDK1. String toString Returns a String object representing this Integer 's value. Since: 1. Parameters: value - the value to be represented by the Integer object. The string is converted to an int value in exactly the manner used by the parseInt method for radix Parameters: s - the String to be converted to an Integer.

Throws: NumberFormatException - if the String does not contain a parsable integer. See Also: parseInt java.

### Calculator in Java

If the radix is smaller than Character. If the first argument is not negative, no sign character appears in the result. The remaining characters of the result represent the magnitude of the first argument. If radix is Nthen the first N of these characters are used as radix- N digits in the order shown. Thus, the digits for hexadecimal radix 16 are abcdef. If uppercase letters are desired, the String. Returns: a string representation of the argument in the specified radix.

See Also: Character. The unsigned integer value is the argument plus 2 32 if the argument is negative; otherwise, it is equal to the argument. Parameters: i - an integer to be converted to a string. The unsigned integer value is the argument plus 2 32 if the argument is negative; otherwise it is equal to the argument. The argument is converted to signed decimal representation and returned as a string, exactly as if the argument and radix 10 were given as arguments to the toString int, int method.

Parameters: i - an integer to be converted. The characters in the string must all be digits of the specified radix as determined by whether Character.The meaning of operators and parentheses is about the same in electronic calculators and in Java.

But Java does integer and floating point math, and sometimes this can make a difference. If one or two sides has a floating point number, then it means floating point division. The result of integer division is always an integer. Integer division determines how many times one integer goes into another. The remainder after integer division is simply dropped, no matter how big it is. There is a difference between what Java will do and what a calculator will do. A calculator will do floating point arithmetic for the expression:.

A calculator will show this as 1.

**Binary Division**

Java will regard this as integer arithmetic and give you:. The result is not rounded up to 2. The remainder after division, 3, is simply dropped.

A handy way to think about integer division is to think about forming groups of pebbles. Say that you had twelve pebbles and wished to arrange them into groups of five. You can form two groups of five pebbles with two pebbles left over. Integer operations and floating point operations are both very common in programs. It is imporant to be clear about them. Advanced Placement Computer Science students are expected to know this subject well.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. But is there another way to get the correct double result? I don't like casting primitives, who knows what may happen. That avoids a cast. But you'll find that the cast conversions are well-defined. You don't have to guess, just check the JLS.

Widening primitive conversions do not lose information about the overall magnitude of a numeric value. Conversion of an int or a long value to float, or of a long value to double, may result in loss of precision-that is, the result may lose some of the least significant bits of the value. Why do you have an irrational fear of casting primitives?

Nothing bad will happen when you cast an int to a double. If you're just not sure of how it works, look it up in the Java Language Specification. Casting an int to double is a widening primitive conversion. You can get rid of the extra pair of parentheses by casting the denominator instead of the numerator:. If you change the type of one the variables you have to remember to sneak in a double again if your formula changes, because if this variable stops being part of the calculation the result is messed up.

I make a habit of casting within the calculation, and add a comment next to it. Otherwise integer Math is always preferred. Producing a double from integer division- there is no other way without casting may be you will not do it explicitly but it will happen.

Now, there are several ways we can try to get precise double value where num and denom are int type, and of-course with casting.

This allows you to look up just once whether the cast does exactly what you want. This method could also be subject to tests, to ensure that it continues to do what you want. It also doesn't matter what trick you use to cause the division you could use any of the answers hereas long as it results in the correct result.

Anywhere you need to divide two integers, you can now just call Utils::divide and trust that it does the right thing. How are we doing? Please help us improve Stack Overflow. Take our short survey.

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