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JavaScript - Math.min() method example

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Created by:
AnnLen
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The Math.min() function returns the smallest number from given numbers.

// ONLINE-RUNNER:browser;
var min = Math.min(2, 5);
console.log( min); // 2

console.log( Math.min(1) ); // 1
console.log( Math.min(1, 2) ); // 1
console.log( Math.min(1, 2, 3) ); // 1
console.log( Math.min(3, 25, -6, 0) ); // -6

console.log( Math.min(-5, -2, -7) ); // -7
console.log( Math.min(2, 1, NaN) ); // NaN
console.log( Math.min() ); // -Infinity

Math.min() function usage with array in ES5 and ES6 example:

// ONLINE-RUNNER:browser;

var array = [7, 10, 5, 8];

// In ES5
console.log(Math.min.apply(Math, array)); // 5

// In ES6 - Spread Operator (...) has  been introduced 
console.log(Math.min(...array)); // 5
console.log(Math.min(100, ...array, 120, ...[151, 152])); // 5

1. Documentation

SyntaxMath.min(number1, number2, ...numbers)
Parametersnumber1, number2, ...numbers - integer or float number values (primitive values).
Result

Minimal number value (primitive value).

It returns Infinity if no arguments are passed.

It returns NaN if at least one of the provided values is not a number.

Descriptionmin is static method that takes number arguments and returns the smallest one value.

2. Getting min value from array examples

2.1. With Array reduce method example

This approach uses reduce method to find minimum value inside array. By making small modification of Math.min(a, b) instruction we are able to find minimal value inside properties of a and b variables.

// ONLINE-RUNNER:browser;

var array = [1, 2, 3];

var result = array.reduce(function(a, b) {
    return Math.min(a, b);
});

console.log(result); // 1

2.2. Recurrent min method example

This approach uses recurrence to find minimum value inside array or nested arrays.

// ONLINE-RUNNER:browser;

function findMin() {
  function checkEntry(entry) {
    if (entry instanceof Array) {
        return findMin.apply(null, entry);
      }
      
      return entry;
  }

  if (arguments.length > 0) {
    var result = checkEntry(arguments[0]);

    for (var i = 1; i < arguments.length; ++i) {
      var value = checkEntry(arguments[i]);

      if (value < result) {
        result = value;
      }
    }

    return result;
  }

  return NaN;
}

console.log(findMin(1, 2, 3, [4, 5, 6],[7, 8, [9, 10]])); // 1

References

  1. Maxima and minima - Wikipedia

 

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JavaScript - Math (EN)

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