javascript

1. variables :-> Modern JavaScript( let ,const) Older JavaScript(var , Automatically)
2. data type :-> (String , Number ,Bigint, Boolean , Object , Undefined , Null , Symbol)
3. Operators :-> (Arithmetic Operators, Assignment Operators, Comparison Operators, Logical Operators, Bitwise Operators)
4. conditional statment :-> (if, else if , else )/ switch
5. loop:->(for , for in , for of , foreach , while , do while)
6. functions , arrow functions
7. array , string :-> ( and there methods)
8. document object model(DOM) :-> (getElementById , getElemrntsByClassname ,getElementByTagname ,quaryselector, quaryselctorAll)