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  1. function - JavaScript | MDN

    The function declaration creates a binding of a new function to a given name.... Try it Syntax js function name(param0) { statements...inconsistent across implementations. js console.log( `'foo' name ${ "foo"...

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  2. Less than or equal (<=) - JavaScript | MDN

    The less than or equal (<=) operator returns true if the left operand is less than or equal to the right operand, and false otherwise.... Try it Syntax js x <= y Description The operands...Examples String to string comparison js "a" <= "b"; // true "a" <= "a";...

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  3. Assignment (=) - JavaScript | MDN

    The assignment (=) operator is used to assign a value to a variable or property. The assignment expression itself has a value, which is the assigned value. This allows multiple assignments to be chained in order to assign a single value to multiple variables.... Try it Syntax js x = y Parameters x A valid assignment...together: js const x = y = 5; This is equivalent to: js const x...

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  4. Division (/) - JavaScript | MDN

    The division (/) operator produces the quotient of its operands where the left operand is the dividend and the right operand is the divisor.... Try it Syntax js x / y Description The / operator...Examples Division using numbers js 1 / 2; // 0.5 Math.floor(3 /...

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  5. void operator - JavaScript | MDN

    The void operator evaluates the given expression and then returns undefined.... Try it Syntax js void expression Description This...following the void operator: js void 2 === "2"; // (void 2) ===...

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  6. parseFloat() - JavaScript | MDN

    The parseFloat() function parses a string argument and returns a floating point number.... Try it Syntax js parseFloat(string) Parameters...following examples all return 3.14 : js parseFloat(3.14); parseFloat("3...

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  7. Storing the information you need — Variables - ...

    By now you should know a reasonable amount about JavaScript variables and how to create them. In the next article, we'll focus on numbers in more detail, looking at how to do basic math in JavaScript....me</button> <h3 id="heading_A"></h3> js const buttonA = document.que...me</button> <h3 id="heading_B"></h3> js const buttonB = document.que...

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  8. SyntaxError: use of super property/member acces...

    The JavaScript exception "use of super property/member accesses only valid within methods or eval code within methods" occurs when the super.x or super[x] syntax is used outside of a method....outside of a method in an object: js const obj = { __proto__: { x:...the effect of being a method: js function getX() { return super...

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  9. Nullish coalescing assignment (??=) - JavaScrip...

    The nullish coalescing assignment (??=) operator, also known as the logical nullish assignment operator, only evaluates the right operand and assigns to the left if the left operand is nullish (null or undefined).... Try it Syntax js x ??= y Description Nullish coalescing...error, despite x being const : js const x = 1; x ??= 2; Neither...

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  10. Conditional (ternary) operator - JavaScript | MDN

    The conditional (ternary) operator is the only JavaScript operator that takes three operands: a condition followed by a question mark (?), then an expression to execute if the condition is truthy followed by a colon (:), and finally the expression to execute if the condition is falsy. This operator is frequently used as an alternative to an if...else statement.... Try it Syntax js condition ? exprIfTrue : exprIfFalse...exprIfFalse . Examples A basic example js const age = 26; const beverage...

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