Make while, for and if return values

if is essentially a while loop that is executed once at most, however return values for if and while are inconsistent.

If returns the value of its last statement as its value:

🦄 .editor
// Entering editor mode (^D to finish, ^C to cancel)
if(true) {
  let b = 4 
}

int ask(if(call(get('true')),block(let('b',4)),block()))
4

However while always returns null:

🦄 .editor
// Entering editor mode (^D to finish, ^C to cancel)
let b = 2
while(b<4) {
  b = b+1 
}

empty ask(let('b',2),while(call(get('<'),get('b'),4),block(assign('b',call(get('+'),get('b'),1)))))
null
🦄 

[mhagmajer]

So you’re thinking that while should be like reduce?

[czerwinskilukasz1]

If I Recall Correctly