freeCodeCamp/use-the-parseint-function.english.md at f53ca79890c176fcc3a7ad207a1278af1403b4fc

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2019-02-14 09:24:02 -08:00

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Raw Blame History

id, title, challengeType, videoUrl

id	title	challengeType	videoUrl
587d7b7e367417b2b2512b23	Use the parseInt Function	1	https://scrimba.com/c/cm83LSW

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);
}

2.0 KiB Raw Blame History