Kaleidoscope: Extending the Language: Control Flow

Kaleidoscope is a language that supports basic control flow constructs such as conditional statements and loops.

Conditional statements in Kaleidoscope use the "if-then-else" syntax, where an expression is evaluated and, based on its value, one of two blocks of code is executed. Here is an example:

def max(x, y) 
  if x > y then x else y

This code defines a function called "max" that takes two arguments, x and y. Inside the function, an if statement is used to compare the values of x and y. If x is greater than y, then x is returned. Otherwise, y is returned.

Kaleidoscope also supports loop constructs such as "while" and "for". Here is an example of a while loop:

def countdown(x)
  while x > 0
    print(x)
    x = x - 1
  print("Blastoff!")

This code defines a function called "countdown" that takes a single argument, x. Inside the function, a while loop is used to print the values of x, decrementing it by 1 each time, until x is equal to 0. Once x is 0, the loop terminates and "Blastoff!" is printed.

In addition to these basic control flow constructs, Kaleidoscope also supports more advanced features such as pattern matching and error handling.