Language guide

Variables

How to declare, reassign, and use variables in kemlang-py.

Declaring a variable

Use aa x che val to declare a new variable. aa means “this”, che means “is”. Types are inferred - you never write them explicitly.


jsk
kem bhai
  aa name    che "Sanket"     // string
  aa age     che 25           // integer
  aa balance che 9.99         // float
  aa active  che bhai chhe   // boolean

  bhai bol name
  bhai bol age
aavjo bhai

Reassigning a variable

Drop the aa to reassign. You cannot reassign a variable that hasn't been declared yet - kemlang-py will throw an error.


jsk
kem bhai
  aa count che 0
  bhai bol count    // 0

  count che 10
  bhai bol count    // 10

  count che count + 5
  bhai bol count    // 15
aavjo bhai

All data types

Strings

Text values. Single or double quotes both work. Concatenate with +.


jsk
aa msg1 che "double quotes"
aa msg2 che 'single quotes'
aa full che msg1 + " and " + msg2
bhai bol full

Integers

Whole numbers, positive or negative.


jsk
aa x che 42
aa y che -7
aa z che 0

Floats

Decimal numbers. Division always returns a float when the result is not whole.


jsk
aa pi    che 3.14159
aa rate  che -0.5
aa ratio che 10 / 3   // 3.333...

Booleans

bhai chhe and bhai nathi are the boolean literals. true and false are also accepted as aliases.


jsk
aa isOn  che bhai chhe    // true
aa isOff che bhai nathi   // false
aa same  che true         // also works

String + number concatenation

If either side of + is a string, the other side is automatically converted. You never need to cast manually.


jsk
kem bhai
  aa score che 87
  bhai bol "Score: " + score   // Score: 87
  bhai bol score + " points"   // 87 points
aavjo bhai

Scope

Variables declared inside a block (jo, farvu) are scoped to that block. They are not accessible outside it.


jsk
kem bhai
  aa x che 10

  jo x > 5 {
    aa msg che "x is big"   // block-scoped
    bhai bol msg            // works
  }

  // bhai bol msg  <-- would error here
aavjo bhai

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