distanceBetweenPillars.js

/*
There are pillars near the road. The distance between the pillars is the same and the width of the pillars is the same. Your function accepts three arguments:

number of pillars (≥ 1);
distance between pillars (10 - 30 meters);
width of the pillar (10 - 50 centimeters).
Calculate the distance between the first and the last pillar in centimeters (without the width of the first and last pillar).
*/

//Answer//

function pillars(num, dist, width) {
return num<2?0:((dist*100)*(num-1))+((num-2)*width)
}