I have two arrays, these are latitude and longitude coordinates
this works when I add 1 coordinate, but how i can add all coordinates?
var marker = new Feature(
new Point([stringLongitude[0],stringLatitude[0]])
);
Multipoint is a class in Openlayers. Not having stated an explicit version I assume you work with the latest.
From the Openlayers documentation:
https://openlayers.org/en/latest/apidoc/module-ol_geom_MultiPoint-MultiPoint.html
The multipoint class may receive an array of lat lng
new MultiPoint([
[lng, lat]
[lng, lat], opt_layout)