<=

(<= <x1> <x2> <3> …) returns #t if the arguments are monotonically nondecreasing, #f otherwise. Using it on inexact arguments may be unreliable because a small inaccuracy may affect the result. At least 2 parameters are required.

Example:

[1] (<= 44 44)
#t
[2] (<= 45 46 47)
#t
[3] (<= 3 2 4)
#f
[4]