Deleted comment and calculated the constant in QrCode.getNumRawDataModules() in all language versions except Java, because only the Java code explains the calculation in detail.

c/qrcodegen.c

@@ -253,7 +253,7 @@ testable int getNumRawDataModules(int version) {
 		int numAlign = version / 7 + 2;
 		result -= (25 * numAlign - 10) * numAlign - 55;
 		if (version >= 7)
-			result -= 18 * 2;  // Subtract version information
+			result -= 36;
 	}
 	return result;
 }

cpp/QrCode.cpp

@@ -520,7 +520,7 @@ int QrCode::getNumRawDataModules(int ver) {
 		int numAlign = ver / 7 + 2;
 		result -= (25 * numAlign - 10) * numAlign - 55;
 		if (ver >= 7)
-			result -= 18 * 2;  // Subtract version information
+			result -= 36;
 	}
 	return result;
 }

javascript/qrcodegen.js

@@ -628,7 +628,7 @@ var qrcodegen = new function() {
 			var numAlign = Math.floor(ver / 7) + 2;
 			result -= (25 * numAlign - 10) * numAlign - 55;
 			if (ver >= 7)
-				result -= 18 * 2;  // Subtract version information
+				result -= 36;
 		}
 		return result;
 	};

python/qrcodegen.py

@@ -515,7 +515,7 @@ class QrCode(object):
 			numalign = ver // 7 + 2
 			result -= (25 * numalign - 10) * numalign - 55
 			if ver >= 7:
-				result -= 18 * 2  # Subtract version information
+				result -= 36
 		return result
 	
 	

rust/src/lib.rs

@@ -649,7 +649,7 @@ impl QrCode {
 			let numalign: usize = (ver as usize) / 7 + 2;
 			result -= (25 * numalign - 10) * numalign - 55;
 			if ver >= 7 {
-				result -= 18 * 2;  // Subtract version information
+				result -= 36;
 			}
 		}
 		result

typescript/qrcodegen.ts

@@ -591,7 +591,7 @@ namespace qrcodegen {
 				let numAlign: int = Math.floor(ver / 7) + 2;
 				result -= (25 * numAlign - 10) * numAlign - 55;
 				if (ver >= 7)
-					result -= 18 * 2;  // Subtract version information
+					result -= 36;
 			}
 			return result;
 		}