Is the square root of 25 an integer because it equals 5 which is an integer?

An integer is also called a whole number .

It is not usual for square roots to be integers. This only happens if the number under de root is a square. This is because square-rooting is just the opposite operation from squaring.

##sqrtx## means: give me the number of which ##x## is the square.

Example with non-integer: ##sqrt2=1.414213562...## (this goes on, but NO calculator can give all the decimals), because ##1.414213562...^2=2##