Hello, var, let, and const

Nim compiles to C (or C++/JS) and then to a native binary. nim r hello.nim compiles and runs; nim c -d:release hello.nim builds an optimized executable.

echo prints its arguments joined with no separator and adds a newline: echo "x = ", 5.

var is mutable, let is assigned once at runtime, const is computed at compile time.

Indentation defines blocks (spaces only). Comments start with #; #[ ... ]# spans lines.

Identifiers are style-insensitive after the first letter: myName, my_name, and myname are the same identifier.

const greeting = "hello"
let name = "nim"
var count = 1
count += 2
echo greeting, ", ", name, "! count = ", count
const squares = block:
  var s = 0
  for i in 1..10: s += i * i
  s
echo squares
var my_value = 7
echo myValue