Should I use if-else statement while returning a value?
I preper to use if-else statement while returning a value in each block when the line number of method is not more than 10. However if there is 30 or more line , it is hardly read if-else statements so using just return value instead of using else value could be better.
Why are conditional statements called branching statements?
Conditional statements are also called branching statements because when a condition is matched, the flow goes one way into one branch of the code. If a condition is not met, another condition is evaluated (if there is one). This evaluation continues until either all conditions are evaluated to true or false.
What happens if a condition returns true?
If the condition returns true the value of x is returned, else the value of z is returned. When the expression (y > z ? y : z) gets executed it further checks the condition y > z. If the condition returns true the value of y is returned, else the value of z is returned.
How do conditional statements change the program flow?
Conditional statements change the program flow. Conditional statements are also called branching statements because when a condition is matched, the flow goes one way into one branch of the code. If a condition is not met, another condition is evaluated (if there is one).
Overview
The ternary conditional operator?: allows us to define expressions in Java.It’s a condensed form of the if-elsestatement that also returns a value. In this tutorial, we’ll learn when and how to use a ternary construct. We’ll start by looking at its syntax and then explore its usage.
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Syntax
The ternary operator ?: in Java is the only operator that accepts three operands: The very first operand must be a boolean expression, and the second and third operands can be any expression that returns some value. The ternary construct returns expression1 as an output if the first operand evaluates to true, expression2otherwise.
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Ternary Operator Example
Let’s consider this if-elseconstruct: Here we have assigned a value to msg based on the conditional evaluation of num. We can make this code more readable and safe by easily replacing the if-elsestatement with a ternary construct:
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Expression Evaluation
When using a Java ternary construct, only one of the right-hand side expressions, i.e. either expression1 or expression2, is evaluated at runtime. We can test that out by writing a simple JUnittest case: Our boolean expression12 > 10 always evaluates to true, so the value of exp2remained as-is. Similarly, let’s consider what happens for a falsecond
Nesting Ternary Operator
It’s possible for us to nest our ternary operator to any number of levels of our choice. So, this construct is valid in Java: To improve the readability of the above code, we can use braces () wherever necessary: However, please note that it’s not recommended to use such deeply nested ternary constructs in the real world. This is because it makes t
Conclusion
In this quick article, we learned about the ternary operator in Java. It isn’t possible to replace every if-elseconstruct with a ternary operator. But it’s a great tool for some cases and makes our code much shorter and more readable. As usual, the entire source code is available over on GitHub.
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Java is equipped with a selection operator that allows us to construct a conditional expression If the result is true, then evaluate expression-1 and return its value, otherwise evaluate expression-2 and return its value
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Java is equipped with a selection operator that allows us to construct a conditional expression If the result is true, then evaluate expression 1 and return its value, otherwise evaluate expression 2 and return its value Example System
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All rights reserved 5 8 Boolean Expressions • A condition often uses one of Java's equality operators or relational operators, which all return boolean results
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