$isBoolean

The function $isBoolean[value] checks if a value is a boolean (true or false). It returns true if the value is strictly a boolean, and false in all other cases (number, text, etc.).

Syntax

$isBoolean[value]

Parameters

Parameter	Description
value	The value to test.

Return Value

• Type: Boolean
• true if value is true or false.
• false if value is a number, a character string, or empty.

Behavior

• Only the literals true and false are recognized as booleans.
• "true" (string) is not a boolean.
• 0 and 1 are not booleans (use $isNumber[] for those cases).

Examples

Validation in a condition

$if[$isBoolean[$message[1]]==true]
  $sendMessage[✅ $message[1] is a valid boolean.]
$else
  $sendMessage[❌ $message[1] is not a boolean. Expected: true or false.]
$endif

Checking a variable

$var[actif;true]
$if[$isBoolean[$var[actif]]==true]
  $sendMessage[The variable is a boolean.]
$endif

Advanced type checking

$var[val;$message[1]]
$if[$isBoolean[$var[val]]==true]
  $sendMessage[📌 Boolean detected: $var[val]]
$elseif[$isInteger[$var[val]]==true]
  $sendMessage[🔢 Integer detected: $var[val]]
$elseif[$isNumber[$var[val]]==true]
  $sendMessage[🔣 Number detected: $var[val]]
$else
  $sendMessage[📝 Text detected: $var[val]]
$endif

Notes

• $isBoolean[true] returns true.
• $isBoolean[false] returns true.
• $isBoolean[0] returns false (0 is a number).
• $isBoolean[] (empty) returns false.