freeCodeCamp/curriculum/challenges/en/08-coding-interview-prep/rosetta-code/i-before-e-except-after-c.en.md

title, id, challengeType

title	id	challengeType
I before E except after C	5a23c84252665b21eecc7eb0	5

Description

The phrase "I before E, except after C" is a widely known mnemonic which is supposed to help when spelling English words. Using the words provided, check if the two sub-clauses of the phrase are plausible individually:

1. "I before E when not preceded by C".
2. "E before I when preceded by C".

If both sub-phrases are plausible then the original phrase can be said to be plausible. Write a function that accepts a word and check if the word follows this rule. The function should return true if it follows the rule otherwise false.

Instructions

Tests

- text: '''<code>IBeforeExceptC</code> should be a function.'''
  testString: 'assert(typeof IBeforeExceptC==''function'',''<code>IBeforeExceptC</code> should be a function.'');'
- text: '''<code>IBeforeExceptC("receive")</code> should return a boolean.'''
  testString: 'assert(typeof IBeforeExceptC("receive")==''boolean'',''<code>IBeforeExceptC("receive")</code> should return a boolean.'');'
- text: '''<code>IBeforeExceptC("receive")</code> should return <code>true</code>.'''
  testString: 'assert.equal(IBeforeExceptC("receive"),true,''<code>IBeforeExceptC("receive")</code> should return <code>true</code>.'');'
- text: '''<code>IBeforeExceptC("science")</code> should return <code>false</code>.'''
  testString: 'assert.equal(IBeforeExceptC("science"),false,''<code>IBeforeExceptC("science")</code> should return <code>false</code>.'');'
- text: '''<code>IBeforeExceptC("imperceivable")</code> should return <code>true</code>.'''
  testString: 'assert.equal(IBeforeExceptC("imperceivable"),true,''<code>IBeforeExceptC("imperceivable")</code> should return <code>true</code>.'');'
- text: '''<code>IBeforeExceptC("inconceivable")</code> should return <code>true</code>.'''
  testString: 'assert.equal(IBeforeExceptC("inconceivable"),true,''<code>IBeforeExceptC("inconceivable")</code> should return <code>true</code>.'');'
- text: '''<code>IBeforeExceptC("insufficient")</code> should return <code>false</code>.'''
  testString: 'assert.equal(IBeforeExceptC("insufficient"),false,''<code>IBeforeExceptC("insufficient")</code> should return <code>false</code>.'');'
- text: '''<code>IBeforeExceptC("omniscient")</code> should return <code>false</code>.'''
  testString: 'assert.equal(IBeforeExceptC("omniscient"),false,''<code>IBeforeExceptC("omniscient")</code> should return <code>false</code>.'');'

Challenge Seed

function IBeforeExceptC (word) {
  // Good luck!
}

Solution

function IBeforeExceptC (word)
{
	if(word.indexOf("c")==-1 && word.indexOf("ie")!=-1)
		return true;
	else if(word.indexOf("cei")!=-1)
		return true;
	return false;
}