$kemlang-py
docs

Language guide

Control Flow

Conditionals and loops - the building blocks of any real program.

If statement - jo

jo means “if”. The condition goes between jo and the opening brace. No parentheses required.

jsk
kem bhai
  aa temp che 38

  jo temp > 37 {
    bhai bol "Fever!"
  }
aavjo bhai
output
Fever!

If-Else - jo / nahi to

nahi to means “otherwise”. It must immediately follow the closing brace of the jo block.

jsk
kem bhai
  aa age che 16

  jo age >= 18 {
    bhai bol "Can vote"
  } nahi to {
    bhai bol "Cannot vote yet"
  }
aavjo bhai
output
Cannot vote yet

Chained conditions

kemlang-py has no else if keyword. Nest another jo inside a nahi to block instead.

jsk
kem bhai
  aa score che 74

  jo score >= 90 {
    bhai bol "A grade"
  } nahi to {
    jo score >= 75 {
      bhai bol "B grade"
    } nahi to {
      jo score >= 60 {
        bhai bol "C grade"
      } nahi to {
        bhai bol "Fail"
      }
    }
  }
aavjo bhai
output
C grade

While loop - farvu / jya sudhi

farvu means “to do”. jya sudhi means “as long as”. The body executes first, then the condition is checked - similar to a do-while in other languages.

jsk
kem bhai
  aa i che 1
  farvu {
    bhai bol i
    i che i + 1
  } jya sudhi i <= 5
aavjo bhai
output
1
2
3
4
5

Infinite loop with break

Use bhai chhe (true) as the condition for an infinite loop, then break out with tame jao.

jsk
kem bhai
  aa n che 1
  farvu {
    bhai bol n
    n che n + 1
    jo n > 3 { tame jao }
  } jya sudhi bhai chhe
aavjo bhai
output
1
2
3

Break - tame jao

tame jao (you go) exits the innermost loop immediately. Execution resumes after the loop.

jsk
kem bhai
  aa i che 0
  farvu {
    i che i + 1
    jo i == 5 {
      bhai bol "Found 5!"
      tame jao
    }
  } jya sudhi i < 100
  bhai bol "Loop ended at: " + i
aavjo bhai
output
Found 5!
Loop ended at: 5

Continue - aagal vado

aagal vado (move forward) skips the rest of the current iteration and jumps straight to the condition check.

jsk
kem bhai
  // print only odd numbers 1-9
  aa i che 0
  farvu {
    i che i + 1
    jo i % 2 == 0 { aagal vado }
    bhai bol i
  } jya sudhi i < 10
aavjo bhai
output
1
3
5
7
9

Truthy and falsy values

Conditions accept any value - not just booleans. The following values are falsy; everything else is truthy.

falsy valuestruthy (everything else)
bhai nathi
false
0
"" (empty string)
none
any non-zero number
any non-empty string
bhai chhe / true
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