JavaScript: Logical Comparisons

Question 1

Arithmetic Operators

Answer 1

Combine with numbers to form an expression that returns a single number.

console.log(a + b);
console.log(a - b);
console.log(a / b);
console.log(a * b);

Question 2

Modulus Operator %

Answer 2

Returns the remainder between two numbers.

console.log(a % b);

Question 3

Comparison Operators: == and !==

Answer 3

Comparison operators combine with strings, booleans and numbers to form an expression that evaluates to true or false.

Compares equality of value, not data type.

console.log(b == c);
console.log(b != c);

Question 4

Comparison Operators: === and !===

Answer 4

Compares equality AND data type (strict equality)

console.log(b === c);
console.log(b !== c);

Question 5

Comparison Operators: <, >, <=, and >=

Answer 5

< and > : Greater than or less than

console.log(a > b);
console.log(a < b);

<= and >= : Greater than or equal to and less than or equal to

console.log(a >= b);
console.log(a <= b);

Question 6

Comparison Operators: &&

Answer 6

Evaluates to true if expression1 AND expression2 are both true, otherwise false.

console.log(expression1 && expression2);

Question 7

Comparison Operators: ||

Answer 7

Evaluates to true if expression1 OR expression2 is true, otherwise false.

console.log(expression1 || expression2);

Question 8

Logical Not (!)

Answer 8

Logical Not (!) turns an expression that evaluates to true to false and vice versa.

If expression2 is true, the following would return as false:

console.log(!expression2);