What is call by value and call by reference ?

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Call by Value - When a method receives a value as an argument, the value received is a copy of the original value of the calling method. Even if the value is altered inside the method, it won't be reflected in the variable in the calling method.Call by reference - When a method receives reference of a variable, any change made to it in the called method won't be reflected in the calling method.

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What is call by value and call by reference ?

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