diff --git a/jank.py b/jank.py
new file mode 100644
index 0000000..7f2a416
--- /dev/null
+++ b/jank.py
@@ -0,0 +1,225 @@
+import sys
+
+variables = {}
+
+
+def expression(exprString):
+    exprString = exprString.strip()
+    
+    openBracket = exprString.find("(")
+    if openBracket != -1:
+        closeBracket = exprString.find(")")
+        beforeBracket = exprString[:openBracket]
+        insideBracket = exprString[openBracket + 1:closeBracket]
+        afterBracket = exprString[closeBracket + 1:]
+        
+        if beforeBracket == "tonumber":
+            innerValue = expression(insideBracket)
+            try:
+                if '.' in str(innerValue):
+                    result = float(innerValue)
+                else:
+                    result = int(innerValue)
+            except (ValueError, TypeError):
+                result = 0
+            bracketResult = str(result)
+            newExprString = bracketResult + afterBracket
+        else:
+            bracketResult = expression(insideBracket)
+            newExprString = beforeBracket + bracketResult + afterBracket
+        
+        exprString = newExprString.strip()
+        
+        if "(" in exprString:
+            return expression(exprString)
+    
+    splitParts = exprString.split("+")
+    parts = []
+    for part in splitParts:
+        strippedPart = part.strip()
+        parts.append(strippedPart)
+    values = []
+    for part in parts:
+        firstChar = part[0]
+        if firstChar == '"':
+            value = part[1:-1]
+        else:
+            try:
+                float(part)
+                if '.' in part:
+                    value = float(part)
+                else:
+                    value = int(part)
+            except ValueError:
+                value = variables.get(part, "")
+        values.append(value)
+    isAllNumbers = True
+    for v in values:
+        if not isinstance(v, (int, float)):
+            isAllNumbers = False
+            break
+    if isAllNumbers:
+        result = sum(values)
+    else:
+        resultParts = []
+        for v in values:
+            resultParts.append(str(v))
+        result = "".join(resultParts)
+    finalResult = str(result)
+    return finalResult
+
+
+def condition(condString):
+    condString = condString.strip()
+    
+    openBracket = condString.find("(")
+    if openBracket != -1:
+        closeBracket = condString.find(")")
+        beforeBracket = condString[:openBracket]
+        insideBracket = condString[openBracket + 1:closeBracket]
+        afterBracket = condString[closeBracket + 1:]
+        bracketResult = condition(insideBracket)
+        if bracketResult:
+            resultStr = "true"
+        else:
+            resultStr = "false"
+        condString = (beforeBracket + resultStr + afterBracket).strip()
+    
+    operators = ["==", "!=", "<=", ">=", "<", ">"]
+    
+    for op in operators:
+        if op in condString:
+            split = condString.split(op, 1)
+            leftExpr = split[0].strip()
+            rightExpr = split[1].strip()
+            
+            leftVal = expression(leftExpr)
+            rightVal = expression(rightExpr)
+            
+            try:
+                leftNum = float(leftVal)
+                rightNum = float(rightVal)
+                leftVal = leftNum
+                rightVal = rightNum
+            except (ValueError, TypeError):
+                pass
+            
+            if op == "==":
+                return leftVal == rightVal
+            elif op == "!=":
+                return leftVal != rightVal
+            elif op == "<":
+                return leftVal < rightVal
+            elif op == ">":
+                return leftVal > rightVal
+            elif op == "<=":
+                return leftVal <= rightVal
+            elif op == ">=":
+                return leftVal >= rightVal
+    
+    return False
+
+
+def file(text):
+    lines = text.splitlines()
+    i = 0
+    while i < len(lines):
+        line = lines[i]
+        if line.strip().lower().startswith("if "):
+            conditionExpr = line.strip()[3:]
+            condResult = condition(conditionExpr)
+            i += 1
+            block_lines = []
+            nesting_depth = 1
+            while i < len(lines) and nesting_depth > 0:
+                current_line = lines[i]
+                if current_line.strip().lower().startswith("if "):
+                    nesting_depth += 1
+                    block_lines.append(current_line)
+                elif current_line.strip().lower() == "endif":
+                    nesting_depth -= 1
+                    if nesting_depth > 0:
+                        block_lines.append(current_line)
+                else:
+                    block_lines.append(current_line)
+                i += 1
+            if condResult:
+                block_text = "\n".join(block_lines)
+                file(block_text)
+        elif line.strip().lower() == "endif":
+            i += 1
+        else:
+            runline(line)
+            i += 1
+        
+def repl():
+    while True:
+        try:
+            line = input("jank> ")
+            if line.strip().lower().startswith("if "):
+                conditionExpr = line.strip()[3:]
+                condResult = condition(conditionExpr)
+                block_lines = []
+                nesting_depth = 1
+                while nesting_depth > 0:
+                    line = input("... ")
+                    if line.strip().lower().startswith("if "):
+                        nesting_depth += 1
+                        block_lines.append(line)
+                    elif line.strip().lower() == "endif":
+                        nesting_depth -= 1
+                        if nesting_depth > 0:
+                            block_lines.append(line)
+                    else:
+                        block_lines.append(line)
+                if condResult:
+                    block_text = "\n".join(block_lines)
+                    file(block_text)
+            else:
+                runline(line)
+        except EOFError:
+            break
+
+def runline(line):
+    line = line.strip()
+    parts = line.split(" ", 1)
+    command = parts[0].lower()
+    try:
+        match command:
+            case "output":
+                expr = parts[1]
+                result = expression(expr)
+                print(result)
+            case "set":
+                expr = parts[1]
+                split = expr.split("=", 1)
+                varName = split[0].strip()
+                valueExpr = split[1].strip()
+                result = expression(valueExpr)
+                variables[varName] = result
+            case "input":
+                expr = parts[1]
+                split = expr.split("=", 1)
+                varName = split[0].strip()
+                valueExpr = split[1].strip()
+                result = expression(valueExpr)
+                inputValue = input(result)
+                variables[varName] = inputValue
+            case "exit":
+                exit()
+            case _:
+                print(f"Unknown command: {command}")
+                
+    except Exception as e:
+        print(f"Error processing line '{line}': {e}")
+
+if __name__ == "__main__":
+    if len(sys.argv) > 1:
+        try:
+            with open(sys.argv[1], 'r') as f:
+                text = f.read()
+                file(text)
+        except Exception as e:
+            print(f"Error reading file: {e}")
+    else:
+        repl()
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