Decision Nodes

Decision nodes create branches in your flowchart.

Syntax

Use the diamond shape for decisions:

check:Is Valid?|diamond

Basic Decision

@flow
[nodes]
  start:Start|terminator
  check:Age >= 18?|diamond
  allow:Grant Access
  deny:Deny Access
  end:End|terminator

[edges]
  start->check
  check->allow:yes
  check->deny:no
  allow->end
  deny->end

Rendered diagram

Multiple Conditions

For more than two branches, chain decisions:

@flow
[nodes]
  start:Start|terminator
  score:Check Score|diamond
  a:Grade A
  b:Grade B
  c:Grade C
  f:Grade F
  end:End|terminator

[edges]
  start->score
  score->a:>= 90
  score->b:>= 80
  score->c:>= 70
  score->f:< 70
  a->end
  b->end
  c->end
  f->end

Rendered diagram

Nested Decisions

Complex logic with nested checks:

@flow
[nodes]
  start:Start|terminator
  hasAccount:Has Account?|diamond
  isActive:Account Active?|diamond
  hasCredit:Has Credit?|diamond
  approve:Approve|terminator
  createAccount:Create Account
  reactivate:Reactivate
  deny:Deny|terminator

[edges]
  start->hasAccount
  hasAccount->isActive:yes
  hasAccount->createAccount:no
  createAccount->hasCredit
  isActive->hasCredit:yes
  isActive->reactivate:no
  reactivate->hasCredit
  hasCredit->approve:yes
  hasCredit->deny:no

Rendered diagram

Decision Labels

Use edge labels to show conditions:

[edges]
  check->yes_path:true
  check->no_path:false

  # Or with more detail
  check->path1:value > 100
  check->path2:value <= 100

Next Steps

• Process Steps - Action nodes

• Examples - Complete flowcharts