thp-web/md/learn/flow-control/match.md

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# Match
## Most likely syntax
```thp
val user_id = POST::get("user_id")
match user_id
| Some(id){ print("user_id exists: {id}") }
| None { print("user_id doesn't exist") }
match user_id
| Some(id)
{
print("user_id exists: {id}")
}
| None
{
print("user_id doesn't exist")
}
match user_id
| Some(id) if id > 0
{
print("user_id exists: {id}")
}
| _
{
print("user_id has other values ")
}
```
## Alternative syntax?
```thp
// Alternative syntax?
match user_id {
Some(id) { print("user_id exists: {id}") }
None { print("user_id doesn't exist") }
}
match user_id {
Some(id) {
print("user_id exists: {id}")
}
None {
print("user_id doesn't exist")
}
}
```