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javascript full guid  JavaScript is a dynamically typed language. Because data type will automatically assigned at the time of compilation or code execution. Jb b ap function return kra gha to variable ma store kra sakty ha sirf console log say ni kr sakty return //datatypes are based on memory allocation Primitive datatypes ->  call by value (string , number , boolean ,null,undefined, BigInt , symbol) -> Stack memory Reference / Non primitive data types -> call by reference ( array , object , function ) -> heap memory JavaScript is a dynamically typed language . This means that you don ' t need to specify the data type of a variable when you declare it . 01_variables.js const accountId = 144553 let accountEmail = " hitesh@google.com " var accountPassword = " 12345 " accountCity = " Jaipur " let accountState ; // accountId = 2 // not allowed accountEmail = " hc@hc.com " accountPassword = ...