Is there some kind of sandbox environment to test my code or do I have to buy/sell with real money?
closed as off-topic by Raghav Sood, chytrik, MCCCS, 0xb10c, Pieter Wuille Feb 15 at 20:36
This question appears to be off-topic. The users who voted to close gave this specific reason:
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Yes, you can use testnet which is that is designed for. You can choose to mine the coin or use a faucet to get some. Since it testnet, there aren't any values to it.