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- To check if a number is positive, use comparison operator: greater than (>) that accepts the number and zero as operands. If number is greater than zero, it returns true, else it returns false. To check if a number is negative, use comparison operator: less than (<) that accepts the number and zero as operands.
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if (myNum > 0) { System.out.println("The value is a positive number."); } else if (myNum < 0) { System.out.println("The value is a negative number."); } else { System.out.println("The value is 0."); Try it Yourself »
Oct 22, 2010 · I was asked in an interview, how to determine whether a number is positive or negative. The rules are that we should not use relational operators such as < , and > , built in java functions (like substring , indexOf , charAt , and startsWith ), no regex, or API's.
Jul 17, 2024 · A positive number is any number greater than zero. For example, 5, 10.7, and 1 are positive numbers. A negative number is any number less than zero. For example, -3, -7.5, and -1 are negative numbers. Basic Approach to Determine Positive or Negative Numbers in Java.
- Overview
- Introduction to The Problem
- Using The ‘<‘ and The ‘>‘ Operators
- Using The signum() Method
- Conclusion
In Java, when we work with types like Integer, Long, Float, and Double, we often want to check if the numbers are positive or negative. This is a fundamental and common number operation. In this quick tutorial, we’ll discuss how to check whether a given number is positive or negative.
Checking whether a number is positive or negative is a pretty straightforward problem. However, before we start looking at the implementations, let’s understand the definition of positive and negative. Given a real number n, if n is greater than zero, it’s a positive number. Otherwise, if n is less than zero, it’s negative. So, we still have a part...
Per definition, whether a number is positive or negative depends on the result of the comparison to zero. Therefore, we can use Java’s “greater than (>)” and “less than (<)” operators to solve the problem. Next, let’s take the Integertype as an example to create a method to do the check: The code above explains itself clearly. Depending on the resu...
We’ve seen how to check if a number is positive or negative using the < and the > operators. Alternatively, we can use the signum()method to get the sign of the given number. For Integer and Long numbers, we can call the Integer.signum() and Long.signum()methods. The signum(n) method returns -1, 0, and 1 when nis negative, zero, or positive. Let’s ...
In this article, we’ve learned two ways to determine whether a given number is positive, negative, or zero. As usual, all code snippets presented here are available over on GitHub.
- Kai Yuan
The most straightforward way to determine if a number is positive or negative is by using comparison operators. In Java, we can use the greater than (>) and less than (<) operators for this purpose.
In this program, you'll learn to check whether a given number is positive or negative. This is done by using a if else statement in Java.
Sep 30, 2024 · Checking whether a number is positive or negative in Java is straightforward using conditional statements. By setting up simple if-else structures, you easily distinguish between positive, negative, and zero values, even with floats or doubles.
