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Write a function that takes a sorted array of numbers and a target number. The function must return the index of the target number in the array if the array contains that number. Otherwise return -1.


Input 1:

const numbers = [ 4, 8, 9, 12, 18 ];
const target = 9;
searchTarget(numbers, target);

Output 1:

2

Input 2:

const numbers = [ 4, 8, 9, 12, 18 ];
const target = 5;
searchTarget(numbers, target);

Output 2:

-1