grammar.txt

primExpr->Number|String|Identifier|(addExpr);
mulExpr->primExpr (mulOperator primExpr)*
mulOperator-> "*"|"/"|"%""
addExpr->mulExpr (addOperator mulExpr)*
addOperator->"+"|"-""

cmpOp->'=='|'!='|'>'|'<'|'>='|'<='
cmpExpr->addExpr (cmpOp addExpr)
boolOp->'&&' | '||'
boolExpr->cmpExpr (boolOp cmpExpr)*
notExpr->'!'* boolExpr
primExpr->number|string|'('expr')'

expr->notExpr
stmt->outStmt
stat->stmt*

OutStmt->"out" addExpr ";"
VorcStmt->("var"|"const)" "<"type">"iden "=" (value | value_expr) ";"
AssignStmt->iden "=" (value | value_expr) ";"
DeleteStmt->"delete" iden ";"
InputStmt->"input" "(" content ")" "=>" identifier ";"
WhileStmt->"while" boolExpr | notBoolExpr ":" block
IfStmt->"if" boolExpr | notBoolExpr ":" block
BlockStmt->"{" stmts "}"