SEOUL, May 15 (Xinhua) -- South Korea's export volume logged a double-digit growth thanks to solid demand for locally-made semiconductors, central bank data showed Friday.

The export volume index spiked 12.4 percent in April from a year earlier, continuing to expand since November last year, according to the Bank of Korea.

In terms of volume, exports of computers, electronic and optical devices surged 31.4 percent on the back of soaring demand for memory chips for artificial intelligence chipsets.

Export volume for coal and oil products tumbled in double figures amid surging crude oil price.

The export value index jumped 50.2 percent in April from a year earlier.

The import volume index fell 0.1 percent in the cited month, but the import value index advanced 16.8 percent.

The net terms-of-trade index for goods, or a ratio of export price to import price, was up 14.3 percent in April on a yearly basis owing to a faster increase in export price than import price. ■