irrational number
This is the name given to a real number which isn’t an integer.
An irrational number can’t be expressed as a common fraction.
Decimals which aren’t terminating decimals or recurring decimals are irrational numbers.
Irrational numbers have an infinite number of decimal places.
For example, π is an irrational number:
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π = 3.1415926535897932384626433832795…
The opposite of irrational number is rational number.