Walmart reported another quarter of solid sales on Thursday, but the retail giant, known for its low prices, cautioned that President Trump’s tariffs pose a challenge in keeping prices down.

Walmart, the largest retailer in the United States, said on Thursday that sales at its U.S. stores rose more than 3 percent, to $112.2 billion, in its most recent quarter, which ran through April. The company’s e-commerce sales jumped more than 20 percent, with the fast-growing segment recording its first-ever profitable quarter.

The retailer kept its full-year financial forecast unchanged from its previous projection in February, with revenue expected to increase 3 to 4 percent this year. Many other large companies have recently scrapped their forecasts, saying that it was too difficult to make predictions under the Trump administration’s on-again, off-again tariff policies.

But even as Walmart’s sales remain strong and its projections hold steady, executives said tariffs would likely weigh on the company and may lead to higher prices for shoppers.

“We will do our best to keep our prices as low as possible but given the magnitude of the tariffs, even at the reduced levels announced this week, we aren’t able to absorb all the pressure given the reality of narrow retail margins,” Doug McMillon, Walmart’s chief executive, said in a statement on Thursday.

The latest quarter spanned three months during which tariffs roiled corporate America, and Wall Street analysts and investors closely watched Walmart’s report for any signs of Mr. Trump’s trade wars on the retail sector. Mr. Trump unveiled a suite of tariffs on dozens of countries in early April. On Monday, the Trump administration temporarily lowered tariffs on many Chinese imports to 30 percent, down from the 145 percent rate that had been in place for nearly one month.