Ethereum Cookbook

How to do it...

1. To write the assembly inline, use the assembly keyword:

assembly {    // assembly code}

2. Create local variables in the assembly by using the let keyword. For variables without any assignment, the default value will be assigned:

let xlet y := 2

3. Access the variables that are defined outside the assembly directly:

function f(uint x) public {    assembly {        x := sub(x, 1)    }}

Assigning values to variables that point to memory or storage work differently inside solidity assembly. The assignment will only change the pointer and not the data.

4. Create a for loop in the assembly just like a regular loop:

assembly {    for { let i := 0 } lt(i, 10) { i := add(i, 1) } {         y := add(y, 1)    }}

5. Use the if statement to validate conditions inside ...