After cyber jar effect the special summon monster can it attack?

Yes, a monster Special Summoned by the effect of Cyber Jar can attack during the same turn it was Special Summoned.

Here's why:

* Cyber Jar's effect: When it's destroyed, you Special Summon a monster from your Deck with the same Attribute as Cyber Jar. This effect does not specify any restrictions on the Special Summoned monster's ability to attack.

* General attacking rules: In Yu-Gi-Oh!, monsters can usually attack the turn they are Special Summoned unless the card's effect or a card effect specifically prevents them from doing so.

Therefore, the monster you Special Summon with Cyber Jar's effect is free to attack unless there are other card effects preventing it.

Note: There are some exceptions to this rule. Some monsters' effects may restrict their ability to attack the turn they are Special Summoned, or other cards might have effects that prevent attacking. Always read the card texts carefully to understand the specific conditions of each card.