To run

Create a file like test.o and run

java -jar NLang.jar test.o

It becomes REPL if you don't provide any arguments to jar file.

Supported features

Defining variables

make a = 10;
make b = 15;

Assignment

a = 10;

Evaluate expressions

make a = (2*/12)+(4*b);

Lists

make a = [1,2,3];
print(a);
make b = a.reverse();
print(b);   # [3,2,1]
a.last();   # 3
a.first();  # 1
a.add(14);  # [1,2,3,14]
a.remove(1) # [2,3,14]

Nested lists

make a = [[1,2,3],[4,5,6],[7,8,9]];
a[0][0] = 15;
make b = a[1][1];
print(a[0][0]); # prints 15 
print(b);       # prints 5

For Loop

• To loop through 1 to 3(including) use the below code. if you don't want to include the upper bound just remove = like for 1..3
• For loop had special index variable named i which can be used. it will be only available in the for loop scope.

for 1..=3 {
    print(i);
}

• if you want to give another name to your index variable you can do it like below

for 1..3 : specialIndex {
  print(specialIndex);
} 

You can also use for loop like below

make a = ["Deneme","Test","Nlang"];
for x in a {
    print(x);
}

Nested for example with special index parameters.

make a = [1,2,3];
make b = ["a","b","c"];

for 0..len(a) : x {
    for x..len(b) : y{
        print(a[x],b[y]);
    }
}

Functions

func add(a,b){
    return a+b;
}
make result = add(3,4);
print(result); # 7

Built-in functions

• len function able to measure len of any iterable including strings

  print(len("test"));  # 4
  print(len([1,2,3])); # 3 

• time function to measure time

  make start = time()
  //some stuff
  print("Time passed",time()-time());

HashMaps

make obj = { "key1":"value1"};
print(obj.key1); # value1
print(obj["key1"]); # value1

Error reporting

make a = 2;
for x in a {
    print(x);
}

You will get the following error if you execute the code above

make a = 2;
for x in a {
         ^
    print(x);
Error: variable a is not iterable. at line 2:10

Recursive and Iterative Fibonacci examples

Recursive

func fib(n){
    if(n<2){
        return n;
    }
    return fib(n-1) + fib(n-2);
}
make result = fib(20);
print(result); # 6765

Iterative

func fib(n){
    make result = [0,1];
    for 2..n+1{
        result.add(result[i-1]+result[i-2]);
    }
    return result.last();
}
make result = fib(20);
print(result); # 6765