I'm trying to create a switch statement but I can't seem to be able to use an expression that gets evaluated (rather than a set string/integer). I can easily do this with if statements but case should hopefully be faster. I'm trying the following. var $reward = $("#reward"); switch (amount) { case (amount >= 7500 && amount < 10000):

Mar 13, 2025 · The switch statement evaluates an expression, matching the expression's value against a series of case clauses, and executes statements after the first case clause with a matching value, until a break statement is encountered.

Use the switch statement to select one of many code blocks to be executed. This is how it works: The switch expression is evaluated once. The value of the expression is compared with the values of each case. If there is a match, the associated block of code is executed. If there is no match, the default code block is executed.

How can I use a condition inside a switch statement for JavaScript? In the example below, a case should match when the variable liCount is <= 5 and > 0; however, my code does not work: case 0: setLayoutState("start"); var api = $("#UploadList").data("jsp"); api.reinitialise(); break; case liCount <= 5 && liCount > 0: setLayoutState("upload1Row");

Jun 12, 2015 · When switch is interpreted, the expression in the parentheses is compared to values of the particular cases. So in your case the value of count would be compared to the values of 2, count > 3 and count >= 4. And that won’t work. Although you can rewrite it and compare to true to get it working: case (count == 2): document.write("hi"); break;

Apr 25, 2022 · Both switch and case allow arbitrary expressions. For example: let a = "1"; let b = 0; switch (+a) { case b + 1: alert("this runs, because +a is 1, exactly equals b+1"); break; default: alert("this doesn't run"); }

The JavaScript switch...case statement executes different blocks of code based on the value of a given expression.

The switch statement evaluates an expression, compares its results with case values, and executes the statement associated with the matching case value. The following illustrates the syntax of the switch statement: case value1: statement1; break; case value2: statement2; break; case value3: statement3; break; default: statement; How it works.

Aug 30, 2024 · JavaScript switch statements provide an optimized means for conditionally executing code blocks based on matching expression values. When leveraged effectively, they can reduce branching complexity compared to chained if/else statements. In this comprehensive expert guide, you will learn:

Nov 21, 2024 · The JavaScript switch statement evaluates an expression and executes a block of code based on matching cases. It provides an alternative to long if-else chains, improving readability and maintainability, especially when handling multiple conditional branches.