Nim Reference
Common constructs
const x = 5 Compile-time constant
let y = “Hello” Immutable binding
var z = [1, 2, 3] Mutable variable
proc name(param: int): ReturnType = body
method name(param: float): ReturnType = body
iterator items(list: seq[int]): int = body
template name(param: typed) = body
macro name(param: string): untyped = body
if x > 5:
body
elif y == "Hello":
body
else:
body
case x
of 5:
body
of 1, 2, 3: body
of 6..30:
body
for item in list:
body
for i in 0..<len(list):
body
while x == 5:
if y.len > 0:
break
else:
continue
try:
raise err
except Exception as exc:
echo(exc.msg)
finally: discard
Input/Output
echo(x, 42, "text") readFile("file.txt")
stdout.write("text") writeFile("file.txt", "contents")
stderr.write("error") open("file.txt", fmAppend)
stdin.readLine()
Type definitions
type
MyType = object
field: int
type
Colors = enum
Red, Green,
Blue, Purple
type
MyRef = ref object
field*: string
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