freeCodeCamp/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/use-the-parseint-function.english.md

id, title, challengeType

id	title	challengeType
587d7b7e367417b2b2512b23	Use the parseInt Function	1

Description

The parseInt() function parses a string and returns an integer. Here's an example: var a = parseInt("007"); The above function converts the string "007" to an integer 7. If the first character in the string can't be converted into a number, then it returns NaN.

Instructions

Use parseInt() in the convertToInteger function so it converts the input string str into an integer, and returns it.

Tests

tests:
  - text: <code>convertToInteger</code> should use the <code>parseInt()</code> function
    testString: 'assert(/parseInt/g.test(code), "<code>convertToInteger</code> should use the <code>parseInt()</code> function");'
  - text: <code>convertToInteger("56")</code> should return a number
    testString: 'assert(typeof(convertToInteger("56")) === "number", "<code>convertToInteger("56")</code> should return a number");'
  - text: <code>convertToInteger("56")</code> should return 56
    testString: 'assert(convertToInteger("56") === 56, "<code>convertToInteger("56")</code> should return 56");'
  - text: <code>convertToInteger("77")</code> should return 77
    testString: 'assert(convertToInteger("77") === 77, "<code>convertToInteger("77")</code> should return 77");'
  - text: <code>convertToInteger("JamesBond")</code> should return NaN
    testString: 'assert.isNaN(convertToInteger("JamesBond"), "<code>convertToInteger("JamesBond")</code> should return NaN");'

Challenge Seed

function convertToInteger(str) {

}

convertToInteger("56");

Solution

function convertToInteger(str) {
  return parseInt(str);
}