プログラミングにおける三項演算子

Ternary Operator in Programming - GeeksforGeeks Courses Tutorials Interview Prep DSA Tutorial Interview Questions Quizzes Must Do Advanced DSA System Design Aptitude Puzzles Interview Corner DSA Python Ternary Operator in Programming Last Updated : 26 Mar, 2024 The Ternary Operator is similar to the if-else statement as it follows the same algorithm as of if-else statement but the ternary operator takes less space and helps to write the if-else statements in the shortest way possible. It is known as the ternary operator because it operates on three operands. Table of Content What is a Ternary Operator? Syntax of Ternary Operator Working of Ternary Operator Flowchart of Conditional/Ternary Operator Ternary Operator in C Ternary Operator in C++ Ternary Operator in Java Ternary Operator in Python Ternary Operator in C# Ternary Operator in JavaScript Applications of Ternary Operator Best Practices of Ternary Operator What is a Ternary Operator? The ternary operator is a conditional operator that takes three operands: a condition, a value to be returned if the condition is true , and a value to be returned if the condition is false . It evaluates the condition and returns one of the two specified values based on whether the condition is true or false. Syntax of Ternary Operator: The Ternary operator can be in the form variable = Expression1 ? Expression2 : Expression3 ; It can be visualized into an if-else statement as: if(Expression1) { variable = Expression2; } else { variable = Expression3; } Working of Ternary Operator : The Ternary operator can be in the form variable = Expression1 ? Expression2 : Expression3 ; The working of the Ternary operator is as follows: Step 1: Expression1 is the condition to be evaluated. Step 2A: If the condition( Expression1 ) is True then Expression2 will be executed. Step 2B : If the condition( Expression1 ) is false then Expression3 will be executed. Step 3: Results will be returned Flowchart of Conditional/Ternary Operator: Flowchart of ternary operator Ternary Operator in C: Here are the implementation of Ternary Operator in C language: C #include <stdio.h> int main () { // Define two variables int a = 5 ; int b = 9 ; // Use ternary operator to find the maximum int max = ( a > b ) ? a : b ; // Output the maximum value printf Output true Ternary Operator in C++: Here are the implementation of Ternary Operator in C++ language: C++ #include <iostream> using namespace std ; int main () { // Define two variables int a = 5 ; int b = 9 ; // Use ternary operator to find the maximum int max = ( a > b ) ? a : b ; // Output the maximum value cout << "Maximum: " << max << endl ; // Output: Maximum: 9 return 0 ; } Output true Ternary Operator in Java: Here are the implementation of Ternary Operator in java language: Java public class TernaryOperatorExample { public static void main ( String [] args ) { // Define two variables int a = 5 ; int b = 9 ; // Use ternary operator to find the maximum int max = ( a > b ) ? a : b ; // Output the maximum value System . out . println ( "Maximum: " + max ); // Output: Maximum: 9 } } Output true Ternary Operator in Python: Here are the implementation of Ternary Operator in python language: Python3 # Define two variables a = 5 b = 9 # Use ternary operator to find the maximum max_val = a if a > b else b # Output the maximum value print ( "Maximum:" , max_val ) # Output: Maximum: 9 Output True Ternary Operator in C#: Here are the implementation of Ternary Operator in C# language: C# using System ; class Program { static void Main () { // Define two variables int a = 5 ; int b = 9 ; // Use ternary operator to find the maximum int max = ( a > b ) ? a : b ; // Output the maximum value Console . WriteLine ( "Maximum: " + max ); // Output: Maximum: 9 } } Output True Ternary Operator in Javascript: Here are the implementation of Ternary Operator in javascript language: JavaScript // Define two variables let a = 5 ; let b = 9 ; // Use ternary operator to find the maximum let max = ( a > b ) ? a : b ; // Output the maximum value console . log ( "Maximum: " + max ); // Output: Maximum: 9 Output Maximum: 9 Applications of Ternary Operator: Assigning values based on conditions. Returning values from functions based on conditions. Printing different messages based on conditions. Handling null or default values conditionally. Setting properties or attributes conditionally in UI frameworks. Best Practices of Ternary Operator: Use ternary operators for simple conditional expressions to improve code readability. Avoid nesting ternary operators excessively, as it can reduce code clarity. Use parentheses to clarify complex conditions and expressions involving ternary operators. Conclusion: The conditional operator or ternary operator is generally used when we need a short conditional code such as assigning value to a variable based on the condition. It can be used in bigger conditions but it will make the program very complex and unreadable. 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