JavaScript: 

// If key is in list, returns the first index where

// key is located within list; otherwise returns -1.

function linearSearch(list, key) {

for (var i = 0; i

if (list[i] == key) {

return i;

}

}

return -1;

}

Desk Check
list		key		i		return
28.1	20	23.6	0	15		23.6
[0]	[1]	[2]	[3]	[4]