How to generate a random number that is greater than or equals to a given number

example

a=5
y=randi(number)>=a

Answer 1

[KSSV]

N = 1000 ;
a = 5;
b = 100;
r = (b-a).*rand(N,1) + a;

[Bashir Yusuf Bichi]

can it be possible just to use the lower limit?