Undefined is a term used to describe a variable that has been declared but not yet assigned any value. It is also used to refer to an object property that has not been assigned any value or a function argument that has not been passed in. In JavaScript, undefined is the default value of variables declared without an explicit value.
When a variable is declared, it is set to undefined until a value is assigned to it. If you try to access an object property or call a function argument without assigning it any value, it will also return undefined.
Conclusion
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C'est Quoi eSim Sfr
