Expression

Tcalc expressions are pretty similar to ordinary programming languages, here are some examples:

-3
1 + 2
(1 + 2) * 3
sqrt(2)
1 + 2 * 3 / sqrt(pow(3, 2)) - -pi

if statement is also supported:

if 1 > 0 then 1 else 0

Users can also terminate an expression with a semicolon:

1 + 2;

Binary operators

Operator	Description	Priority
`*`	Multiplication	3
`/`	Division	3
`+`	Addition	2
`-`	Subtraction	2
`==`	Equal to	1
`!=`	Not equal to	1
`>`	Greater than	1
`<`	Less than	1
`>=`	Greater than or equal to	1
`<=`	Less than or equal to	1
`&&`	Logical AND	0
`\\|\\|`	Logical OR	0

Unary operators

Operator	Description
`-`	Negate
`+`	Identity
`!`	Logical NOT

Identifier

Tcalc use alphanumeric characters, underscores and Decimal digits to form identifiers. Identifiers must start with a letter or an underscore, here are some examples:

a
abc
abc123
_abc

If you want to use a non-standard identifier, you can use signle quotes:

'hello world'

Function

Use def keyword to define a function:

def add(a, b) a + b

Tcalc also supports recursive functions:

def fib(n) if n <= 1 then n else fib(n - 1) + fib(n - 2)

You can call a function by its name with arguments:

add(1, 2)

Built-in functions

Function	Description
`sqrt(x)`	Square root
`pow(x, y)`	Power
`sin(x)`	Sine
`cos(x)`	Cosine
`tan(x)`	Tangent
`asin(x)`	Arcsine
`acos(x)`	Arccosine
`atan(x)`	Arctangent

Variable Assignment

Use let keyword to assign a value to a variable:

let a = 1

You can also assign a value to a variable in an expression:

let a = 1 + 2

Built-in variables

Variable	Description
`pi`	Pi
`e`	Euler's number

Import

Use import keyword to import a module:

import hello

or:

import 'hello.tc'