Web Reference: The Boolean Data Type In JavaScript, a Boolean is a primitive data type that can only have one of two values: true or false The Boolean value of an expression is the basis for all JavaScript comparisons and conditions. Mar 26, 2013 · If you assign it 'true' it will become a string, if you assign it true it will become a boolean, if you assign it 1 it will become a number. Subsequent assignments may change the type of the variable later. Boolean is a data type in JavaScript. Boolean can have only two values, true or false. It is useful in controlling program flow using conditional statements.
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