The rupee which was traded at 156.12 per dollar in the early trade ended at 156.20/35, slightly firmer from Wednesday's close of 156.30/40.

The rupee hit an all-time low of 156.50 intraday in the previous session.

"The rupee appreciated as there were some exporter (dollar) sales in the morning. We saw some demand in the latter part of the day," a currency dealer said.

Earlier this month, the country's central bank governor said if the inflation rate could be maintained between 4 percent and 5 percent, the depreciation in the rupee would be around 2 percent or 3 percent.

Dealers said they expected no impact from the $2.5 billion inflow anticipated later this week in two tranches of sovereign bonds, the country's largest offering in history.

The central bank has bought around $400 million from the market in the first three months of this year to help build reserves and repay some debt.

The rupee has weakened 1.73 percent so far this year. It dropped 2.5 percent last year and 3.9 percent in 2016.

Dealers said they expect the rupee to gradually weaken and face higher volatility this year due to debt repayments by the government.

Foreign investors sold government securities worth a net 2.4 billion rupees ($15.36 million) so far this year through April 11, the central bank data showed.