diff --git a/.gitignore b/.gitignore
index 56ada95..8ee8471 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,6 @@
 # Binaries for programs and plugins
 main
-onev
+one
 exec
 *.exe
 *.exe~
diff --git a/lexer.v b/lexer.v
index c08dccb..d7710c0 100644
--- a/lexer.v
+++ b/lexer.v
@@ -26,6 +26,10 @@ enum TokenType as u8 {
 	star
 	slash
 	percent
+	and
+	or
+	and_and
+	or_or
 	equals
 	less
 	greater
@@ -38,6 +42,8 @@ enum TokenType as u8 {
 	star_eq
 	slash_eq
 	percent_eq
+	and_eq
+	or_eq
 	increment
 	decrement
 	lparen
@@ -94,6 +100,12 @@ fn toktype_from_delimiter(delimiter string) TokenType {
 		'%=' {.percent_eq}
 		'++' {.increment}
 		'--' {.decrement}
+		'&'  {.and}
+		'&&' {.and_and}
+		'|'  {.or}
+		'||' {.or_or}
+		'&=' {.and_eq}
+		'|=' {.or_eq}
 		else {.unknown}
 	}
 }
@@ -120,8 +132,8 @@ fn toktype_from_kw(kw string) TokenType {
 
 fn is_delimiter(c u8, is_inside_number bool) bool {
 	valid_chars := match is_inside_number {
-			true {" #+-*/,;:%<>()[]{}=\n\""}
-			false {". #+-*/,;:%<>()[]{}=\n\""}
+			true {" #+-*/,;:%<>()[]{}=|&!\n\""}
+			false {". #+-*/,;:%<>()[]{}=|&!\n\""}
 		}
 	return valid_chars.contains(c.ascii_str())
 }
@@ -190,7 +202,7 @@ fn lex(input string) ?[]Token {
 				mut tok_str := input[right].ascii_str()
 				if right + 1 < input.len {
 					combined := input.substr(right, right + 2)
-					if combined in ['==', '>=', '<=', '!=', '+=', '-=', '*=', '/=', '%=', '++', '--'] {
+					if combined in ['==', '>=', '<=', '!=', '+=', '-=', '*=', '/=', '%=', '++', '--', '||', '&&', '&=', '|='] {
 						tok_str = combined
 						right++
 					}
diff --git a/one b/one
index e7a997e..6ef3e5e 100755
Binary files a/one and b/one differ
diff --git a/parser.v b/parser.v
index 586b4ee..b7b4670 100644
--- a/parser.v
+++ b/parser.v
@@ -18,13 +18,13 @@ enum Precedence {
 
 fn (p Parser) get_precedence(tok_type TokenType) Precedence {
 	return match tok_type {
-    .equals, .plus_eq, .minus_eq, .star_eq, .slash_eq, .percent_eq { .assignment }
-    .eq_eq, .not_eq, .less_eq, .greater_eq, .less, .greater { .comparison }
-    .plus, .minus                                    				{ .sum }
-    .star, .slash, .percent                         				{ .product }
-		.dot                                             				{ .access  }
-		.increment, .decrement                                  { .suffix }
-    else                                             				{ .base}
+    .equals, .plus_eq, .minus_eq, .star_eq, .slash_eq, .percent_eq, .and_eq, .or_eq, .and_and, .or_or {.assignment}
+    .eq_eq, .not_eq, .less_eq, .greater_eq, .less, .greater {.comparison}
+    .plus, .minus {.sum}
+    .star, .slash, .percent {.product}
+		.dot {.access}
+		.increment, .decrement {.suffix}
+    else {.base}
   }
 }
 
@@ -74,9 +74,6 @@ fn (mut s SymbolTable) define_var(name string, typ string, is_const bool) {
 }
 
 fn (mut s SymbolTable) lookup_var(name string) ?VarSymbolInfo {
-	$if debug {
-		dump(s.variable_scopes.len)
-	}
 	if s.variable_scopes.len == 0 {return none}
 	for variables in s.variable_scopes.reverse() {
 		if name in variables {
@@ -518,6 +515,7 @@ fn (mut p Parser) parse_paren() ParenExpr {
 fn (mut p Parser) check_binary_expr_types(expr BinaryExpr) {
 	left_t := p.get_expr_type(expr.left)
 	right_t := p.get_expr_type(expr.right)
+	dump("${left_t}, ${right_t}")
 	if left_t != right_t {
 		parse_error('Type mismatch in expression: ${left_t} and ${right_t}')
 	}
@@ -558,7 +556,7 @@ fn (mut p Parser) get_expr_type(expr Expr) string {
 		BinaryExpr     {
 			p.check_binary_expr_types(expr)
 			left_t := p.get_expr_type(expr.left)
-			if expr.op in ['<=', '==', '>=', '!=', '<', '>'] {
+			if expr.op in ['<=', '==', '>=', '!=', '<', '>', '||', '&&'] {
 				'bool'
 			} else {
 				left_t
@@ -595,7 +593,7 @@ fn (mut p Parser) is_op_valid_for_type(type string, op string) bool {
 			'+', '-', '*', '/', '<', '>', '<=', '>=',
 			'++', '--', '+=', '-=', '*=', '/=',
 		]}
-		'bool' {['=']}
+		'bool' {['&&', '||', '&', '|', '&=', '|=']}
 		else {[]}
 	}
 	legal_ops << global