Linear code is a way of giving instructions to a computer. It is called "linear" because the instructions are given in a line-by-line sequence. It is like giving a list of instructions to a person, but the computer can understand and follow it exactly. For example, if you told a computer to "add two numbers," you could give the instructions in a line-by-line sequence like this:
1. Get the first number
2. Get the second number
3. Add the two numbers
4. Show the answer
The computer will go through each step in turn until it finishes the task.