The LN2 property of the Math object is used to get the natural logarithm of 2.
This is approximately equal to 0.693.
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function doMath(){
var result = Math.LN2;
document.form1.answer.value = result;
}
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The Natural Logarithm of 2 is:
<input type="text" name="answer" size=20>
<input type="button" value="Calculate" onClick='doMath()'>
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</form>
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