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- Function:
**integer-expt***n1 n2* -
Returns

`n1`raised to the power`n2`if that result is an exact integer; otherwise signals an error.`(integer-expt 0`

`n2`)returns 1 for

`n2`equal to 0; returns 0 for positive integer`n2`; signals an error otherwise.

- Function:
**integer-log***base k* -
Returns the largest exact integer whose power of

`base`is less than or equal to`k`. If`base`or`k`is not a positive exact integer, then`integer-log`

signals an error.

- Function:
**integer-sqrt***k* -
For non-negative integer

`k`returns the largest integer whose square is less than or equal to`k`; otherwise signals an error.

- Function:
**quotient***n1 n2* - Function:
**remainder***n1 n2* - Function:
**modulo***n1 n2* are redefined so that they accept only exact-integer arguments.

- Function:
**round-quotient***n1 n2* -
Returns the quotient of

`n1`and`n2`rounded toward even.(quotient 3 2) ⇒ 1 (round-quotient 3 2) ⇒ 2