Conditionals

Like other programming languages, conditionals are supported in Notes Calculator.

The first two fundamental values you need to know are true and false. These values are used to represent the truthiness of a condition.

true                                  | true
false                                 | false

Comparison Operators

Comparison operators are used to compare two values and return a boolean result (true or false).

Operator	Name	Behaviour
==	Equal to	Returns true if left value and right value are equal
!=	Not equal to	Returns true if left value and right value are not equal
>	Greater than	Returns true if the left value is greater than the right value
<	Less than	Returns true if the left value is less than the right value
>=	Greater than or equal to	Returns true if the left value is greater than or equal to the right value
<=	Less than or equal to	Returns true if the left value is less than or equal to the right value

For example:

1 == 1                                | true
1 != 2                                | true
1 < 2                                 | true
2 < 1                                 | false
1 >= 1                                | true
2 <= 2                                | true

Logical Operators

Logical operators are used to combine multiple conditions. The result is true if the combined condition

Operator	Name	Behaviour
&& or and	and	Returns true if both conditions are true
|| or or	or	Returns true if at least one condition is true

1 == 1 && 2 == 2                      | true
1 == 1 and 2 != 2                     | false
1 == 1 || 2 != 2                      | true
1 != 1 or 2 != 2                      | false

if, else, then

The if, else, and then keywords are used to control the flow of execution based on conditions.

earnings = $25k                                  | $25,000
if earnings > $30k then tax = 15% else tax = 5%  | 5%
earnings x tax                                   | $1,250

Declare a variable using a conditional

income = $40k                                    | $40,000
expenses = $25k                                  | $25,000
profitable = true if income > expenses           | true
insolvent = false unless expenses > income       | false