From idea to code
To develop code, you turn a plan into clear instructions the computer can follow. First understand the task, then plan the steps, write the instructions in the right sequence, and finally test the program.
Key idea
Plan first with a flowchart or pseudocode, then write the code, then test and improve it.
Planning tools
- Flowchart: boxes and arrows showing each step in order.
- Pseudocode: the steps written in simple words, not real code.
When you write the instructions, use a sequence for steps in order, selection to make choices, and a loop to repeat steps. Give each instruction clearly so the computer does exactly what you mean.
Example
Pseudocode for a traffic-light game:
if light is green then GO
else STOP
This uses selection to choose the correct action.
Test and improve
Run the program to see if it works. If it has a bug, find the wrong instruction, fix it, and test again. Keep improving until the program does the task correctly. Testing carefully makes your code reliable.