About 31 minutes · progress saved in this browser
Learn Jev
Six short lessons. Each runs a real request and ends with a checkpoint.
What you’ll learn, in one picture
1 · State
“My card was charged twice for order 8812.”
Read once, for every question
2 · Typed questions
- choicedepartment
- scoreseverity
- noulwants_human
All in one request
3 · Typed answers
- departmentbilling
- severity1.2 of 2
- wants_human0.08 yes
Probabilities, not prose. Your code decides.
Illustrative numbers — run it in the playground for real ones.
Six lessons
- The contractYou send a state and a map of named questions. You get back one typed answer per question. That is the whole API.3 min
- Choice — one of a known setA Choice settles which option fits. The probabilities sum to 1, so it must pick something.5 min
- Score — a position on a described spectrumYou give 2 to 10 ordered levels. You get a probability-weighted mean of the level numbers.6 min
- Noul — the probability of a yesOne condition, one number between 0 and 1. No confidence field: two outcomes are fully described by one value.4 min
- Confidence is your routing signalThe answer says what. Confidence says whether to act on it without a person.6 min
- Keep exact checks in codeJev reads; your code computes. Counting, dates and arithmetic belong in code.7 min