When comparing a string with a number, JavaScript will convert the string to a number when doing the comparison. An empty string converts to 0. A non-numeric string converts to NaN …

JavaScript Assignment Operators. Assignment operators assign values to JavaScript variables. The Addition Assignment Operator (+=) adds a value to a variable.

The assert.notEqual() method tests if two values are NOT equal, using the != operator. If the two values are equal, an assertion failure is being caused, and the program is terminated. To …

JavaScript Operators. Operators are used to assign values, compare values, perform arithmetic operations, and more. There are different types of JavaScript operators: Arithmetic Operators; …

A JavaScript Boolean represents one of two values: true or false. Boolean Values Very often, in programming, you will need a data type that can only have one of two values, like

In JavaScript, the equal sign (=) is an "assignment" operator, not an "equal to" operator. This is different from algebra. The following does not make sense in algebra:

JavaScript Strings as Objects. Normally, JavaScript strings are primitive values, created from literals:

Equal: price=9.80!= Not equal: price!=9.80 < Less than: price<9.80 <= Less than or equal to: price<=9.80 > Greater than: price>9.80 >= Greater than or equal to: price>=9.80: or: or: …

Some JavaScript versions interpret numbers as octal if they are written with a leading zero. By default, JavaScript displays numbers as base 10 decimals. But you can use the toString() …

NOT!(x < 5 && x < 10) Reverse the result, returns 0 if the result is 1: Try it »