Solidity Programming Essentials

Passing by reference

When a reference type variable is assigned to another variable or when a reference type variable is sent as an argument to a function, EVM creates a new variable instance and copies the pointer from the original variable into the target variable. This is known as passing by reference. Both the variables are pointing to the same address location. Changing values in the original or target variables will change the value in other variables also. Both the variables will share the same values and change committed by one is reflected in the other variable.