...uint sum){
// Expression that computes data passed in as parameters
// and does not read or modify state
sum = num1 + num2;
}
}
```
输出：
sum = 15
### 为什么要将函数标记为view或pure?
Gas 优化：Gas 消耗只在交易触发时生效，状态被修改时触...
...===================================================
Save this seed phrase and your BIP39 passphrase to recover your new keypair:
new new new new new new new new keypair keypair keypair keypair
========================================================================
```
#### 派生路径含义...