ERC20 Token

Meaning of ERC

First of all, let's know about ERC, ERC is the early version of Ethereum for RFC, Request for Comment.

ERC is termed as an Ethereum request for comment.

What does the ERC20 token specify

20 in ERC20 token means the 20th ERC that was posted by somebody. That person proposed a general interface for fungible tokens.

Fungible Tokens

Fungible tokens specify that each token doesn't have any priority or uniqueness, they are all worth equally the same, just like any currency (e.g. Rupees, Dollars, Yen, etc).

ERC20 token works similarly just like fungible tokens, it doesn't distinguish whether you have token no.1 or token no.100 they all represent same value.

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