Quick Reference
JavaScript comparison operators are used in logical statements to determine equality or inequality between variables and/or values.
Equal To
x == 8 // determines if x is equal to 8Equal Value and Equal Type
x === 8 // determines if x is equal to 8 and is the same data type (8 not "8")Not Equal To
x != 8 // determines if x is NOT equal to 8Not Equal Value OR Not Equal Type
x !== 8 // determines if x is NOT equal to 8 OR is NOT the same data type (8 not "8")Greater Than
x > 8 // determines if x is greater than 8Less Than
x < 8 // determines if x is less than 8Greater Than OR Equal To
x >= 8 // determines if x is greater than or equal to 8Less Than OR Equal To
x <= 8 // determines if x is less than or equal to 8Note
There is NO SPACE between the operators. x == 8 is NOT the same as x = = 8. Adding the space between the operators will cause it to fail.
JavaScript Notes:
- When using JavaScript, single or double quotation marks are acceptable and work identically to one another; choose whichever you prefer, and stay consistent
- JavaScript is a case-sensitive language; firstName is NOT the same as firstname
- Arrays count starting from zero NOT one; so item 1 is position [0], item 2 is position [1], and item 3 is position [2] … and so on
- JavaScript variables must begin with a letter, $, or _
- JavaScript variables are case sensitive (x is not the same as X)
We’d like to acknowledge that we learned a great deal of our coding from W3Schools and TutorialsPoint, borrowing heavily from their teaching process and excellent code examples. We highly recommend both sites to deepen your experience, and further your coding journey. We’re just hitting the basics here at 1SMARTchicken.