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

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

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;
}