Ternary Operator: The “Question mark” or “conditional” operator in JavaScript is known as ternary operator that has three operands. It is used to simplify the if/else operator.
Examples:
Input: let result = (10 > 0) ? true : false;
Output: true Input: let message = (20 > 15) ? "Yes" : "No"; Output: Yes
Syntax:
condition ? value if true : value if false
- condition: Expression to be evaluated which returns a boolean value.
- value if true: Value to be executed if the condition results in a true state.
- value if false: Value to be executed if the condition results in a false state.
Characteristics of Ternary Operator:
The expression consists of three operands: the condition, value if true, and value if false.
- The evaluation of the condition should result in either true/false or a boolean value.
- The true value lies between “?” & “:” and is executed if the condition returns true. Similarly, the false value lies after “:” and is executed if the condition returns false.
Example 1: Below is an example of the Ternary Operator.
JavaScript
function test() { // JavaScript to illustrate // Conditional operator let PMarks = 40 let result = (PMarks > 39) ? "Pass" : "Fail"; console.log(result);}test(); |
Output:
Pass
Example 2: Below is an example of the Ternary Operator.
JavaScript
function test() { // JavaScript to illustrate // Conditional operator let age = 60 let result = (age > 59) ? "Senior Citizen" : "Not a Senior Citizen"; console.log(result);}test(); |
Output:
Senior Citizen
Example 3: An example of multiple conditional operators.
JavaScript
function test() { // JavaScript to illustrate // multiple Conditional operators let marks = 95; let result = (marks < 40) ? "Fail" : (marks < 60) ? "Average" : (marks < 80) ? "Good" : "Excellent"; console.log(result);}test(); |
Output:
Excellent
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