## Posts Tagged ‘division

04
Apr
09

### [Javascript] Divide Simple Algebraic Terms

Been working on some maths things today, and wrote this function to divide basic terms.
Will work on any string in the format of:
ax^n; where a = any number, x = any constant character, n = any number

```function divideTerm(Term1, Term2, constantChar) {
//The coefficient of the first Term
var Term1coeff = Term1.split(constantChar)[0];
//The power of the first Term
var Term1power = Term1.split("^")[1];
//The coefficient of the second Term
var Term2coeff = Term2.split(constantChar)[0];
//The power of the second Term
var Term2power = Term2.split("^")[1];
//If no coefficient, set to 1
if(Term1coeff==""){Term1coeff=1;}
//If no power, set to 1
if(String(Term1power)=="undefined"){Term1power=1;}
//If no coefficient, set to 1
if(Term2coeff==""){Term2coeff=1;}
//If no power, set to 1
if(String(Term2power)=="undefined"){Term2power=1;}
//Divide the two coefficients, add the character and claret, subtract the two powers
return String(Term1coeff/Term2coeff) + constantChar + "^" + String(Term1power-Term2power);
}```

Usage:
Sample project:

```<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Dividing Alg Terms</title>
<script language="javascript" type="text/javascript">
function divideTerm(Term1, Term2, constantChar) {
var Term1coeff = Term1.split(constantChar)[0];
var Term1power = Term1.split("^")[1];
var Term2coeff = Term2.split(constantChar)[0];
var Term2power = Term2.split("^")[1];
if(Term1coeff==""){Term1coeff=1;}
if(String(Term1power)=="undefined"){Term1power=1;}
if(Term2coeff==""){Term2coeff=1;}
if(String(Term2power)=="undefined"){Term2power=1;}
return String(Term1coeff/Term2coeff) + constantChar + "^" + String(Term1power-Term2power);
}

function divide() {
document.getElementById("result").value = divideTerm(
document.getElementById("trm1").value,
document.getElementById("trm2").value,
document.getElementById("char").value);
}
</script>

<body>
<form id="form1" name="form1" method="post" action="">
<table width="297" border="0">
<tr>
<td width="143"><strong>Term 1: </strong></td>
<td width="144"><input name="textfield3" type="text" id="trm1" value="147x^23" /></td>
</tr>
<tr>
<td><strong>Term 2: </strong></td>
<td><input name="textfield4" type="text" id="trm2" value="24.5x^19" /></td>
</tr>
<tr>
<td><strong>Constant Character: </strong></td>
<td><input name="textfield" type="text" id="char" value="x" /></td>
</tr>
<tr>
<td colspan="2"><div align="center">
<br />
<input name="button" type="button" value="Divide" onclick="divide()" />
</div></td>
</tr>
<tr>
<td>&nbsp;</td>
<td>&nbsp;</td>
</tr>
<tr>
<td><strong>Result:</strong></td>