Definition and Usage. The if/else statement executes a block of code if a specified condition is true. If the condition is false, another block of code can be executed. The if/else statement is a part of JavaScript’s Conditional Statements, which are used to perform different actions based on different conditions.
If you intend to return from the function at this point in its execution regardless of whether the test evaluates true or false, you can use, return (value) ? 1 : 2; But if you merely wish to return early when a test evaluates true (for instance, as a sanity-check to prevent execution when parameters are invalid), the shortest you can make it is:, In JavaScript we have the following conditional statements: Use if to specify a block of code to be executed, if a specified condition is true; Use else to specify a block of code to be executed, if the same condition is false; Use else if to specify a new condition to test, if the first condition is false, The syntax for the else if statement in JavaScript is: if (condition1) { // statements to execute when condition1 is TRUE } else if (condition2) { // statements to execute when condition1 is FALSE and condition2 is TRUE } else { // statements to execute when both condition1 and condition2 are FALSE }, JavaScript : return statement – w3resource, JavaScript – if…else Statement – Tutorialspoint, JavaScript if/else Statement – W3Schools, JavaScript: if-else Statement – techonthenet.com, 2/26/2020 · The return statement returns a value and exits from the current function. Version. Implemented in JavaScript 1.0. Syntax. return expression . Parameters. expression: The expression to return. If not present, the function does not return a value. Example: In the following web document rectangle_area() function returns the area of a rectangle. HTML Code, In the above program, the user passes a number as an argument when calling a function. In each iteration, the number value is decreased by 1 and function countDown() is called until the number is positive. Here, newNumber > 0 is the base condition. This.
Disallow return before else (no-else-return) The –fix option on the command line can automatically fix some of the problems reported by this rule. If an if block contains a return statement, the else block becomes unnecessary. Its contents can be placed outside of the block. function foo() { if (x) { return y; } else { return z; } }
