14 — JSON: save and load data

One file can hold a whole record. JSON stores several values together as text, so a name and a score come back later — even after the program closes.

#Steps

1. Create record.nme and save a record:

   use file latest
   record = {"name": "Mina", "score": 7}
   json_save("record.json", record)
   

   copyrun it →

   json_save writes the dict into record.json as JSON text.

2. Run it and look at the new file:

   nme r record
   cat record.json
   

   copy

   The file stores the data as {"name": "Mina", "score": 7}.

3. Load it back in a fresh program, load.nme:

   use file latest
   record = json_load("record.json")
   say f"{record['name']} scored {record['score']}"
   

   copyrun it →

   Run nme r load; it prints Mina scored 7 — the values survived the end of the first program.

4. Korean uses json저장 and json읽기:

   파일 사용 최신
   기록 = {"이름": "민수", "점수": 7}
   json저장("기록.json", 기록)
   기록 = json읽기("기록.json")
   말해 f"{기록['이름']}: {기록['점수']}점"
   

   copyrun it →

#Try it yourself

Save a dict with your city and age, then load it back in one program:

use file latest
me = {"city": "Seoul", "age": 12}
json_save("me.json", me)
back = json_load("me.json")
say f"I live in {back['city']} and I am {back['age']}"

#What you learned

• json_save(path, value) / json저장(경로, 값) writes a dict to a file.
• json_load(path) / json읽기(경로) reads it back into a dict.
• A JSON file survives after the program ends; another run can load it.
• Values inside the dict use subscripts such as record["name"].