Pushpop: Design

The first thing you should know about stack-based languages is that they are strange. Learning to code in a concatenative style will rewire your synapses.

In fact, stack machines are a common way to implement virtual machines and bytecode interpreters.

The fundamental premise of a stack-based language is that instead of assigning values to variables, values are pushed onto an operand stack, and _

# Comments start with a hash and continue

```
# to the next newline character. Their
```

# content is ignored by the interpreter.

```
42 -341 3.14159 1.2e-9        # numbers
```
```
"'scare' quotes" '\'\\\n\t'   # text
```
```
:true :is-empty?              # symbols
```

nil                           # the special value 'nil'

Text values are Unicode glyphs enclosed in either single or double quotes. Quotes within text are allowed if they are escaped by prefixing them with a backslash. Other character escape sequences

```
"'scare' quotes" -341 3.14159 1.2e-9
```