Compare within margin.js

// Create a function close_compare that accepts 3 parameters: a, b, and an optional margin. The function should return whether a is lower than, close to, or higher than b. a is "close to" b if margin is higher than or equal to the difference between a and b.

// When a is lower than b, return -1.

// When a is higher than b, return 1.

// When a is close to b, return 0.

// If margin is not given, treat it as zero.

// Example: if a = 3, b = 5 and the margin = 3, since a and b are no more than 3 apart, close_compare should return 0. Otherwise, if instead margin = 0, a is lower than b and close_compare should return -1.

// Assume: margin >= 0

// Tip: Some languages have a way to make arguments optional.

function closeCompare(a, b, margin){

    if(margin === '') {let marign = 0}
    
    if(margin >= Math.abs(a-b) || a === b) {return 0}
    else if(a > b ) {return 1}
    else if(a < b || margin === 0) {return -1}
    
  }