I want to give the exams of IES and for that I want to get the details of eligibility criteria and the number of attempts so can you provide me that?

As you want to get the details of eligibility criteria and the number of attempts of exam of IES so here is the information of the same for you:

Educational Qualifications:
Candidates must have passed a degree in Engineering from a University incorporated by an Act of the Central or State Legislature in India or other Educational Institutions established by an Act of Parliament or declared to be deemed as Universities under Section 3 of the University Grants Commission Act, 1956;

Or

Candidates must have passed Section A and B of the Institution Examinations of the Institution of Engineers (India);

Or

Candidates must have passed a degree/diploma in Engineering from such foreign University/College/Institution and under such conditions as may be recognised by the Government for the purpose from time to time,

Or

Candidates must have passed Graduate Membership Examination of the Institute of Electronics and Telecommunication Engineers (India)

Or

Candidates must have passed Associate Membership Examination Parts II and III/Sections A and B of the Aeronautical Society of India

Or

Candidates must have passed Graduate Membership Examination of the Institution of Electronics and Radio Engineers, London held after November, 1959.

Nationality:
A candidate must be either:

(a) A citizen of India, or
(b) a subject of Nepal, or
(c) a subject of Bhutan, or
(d) a Tibetan refugee who came over to India before 1st January, 1962 with the intention of permanently settling in India. or
(e) a person of Indian origin who has migrated from Pakistan, Burma, Srilanka, East African countries of Kenya, Uganda, the United Republic of Tanzania, Zambia, Malawi, Zaire, Ethiopia and Vietnam with the intention of permanently settling in India.

Age Limits:
Minimum 21 years and maximum 30 years on 1st January, 2012 i.e. he/she must have been born between 2nd January, 1982 and 1st January, 1991.

There will be no limit on the number of attempts for IES Exam. One can attempt for IES Exam any number of times if he possess the required age for the Exam.