Natural number
(1,2,3,4,........,n)
1 is the smallest natural number

Whole number
(0,1,2,3,.......,n)

Integers
(-n,......,-3,-2,-1,0,+1,+2,+3,........,+n)

Rational numbers
All numbers of (p/q) form where (q≠0)...
Eg. 1/4= 0.25 #terminating decimal
1/3= 0.3333 # non terminating decimal

There are some exceptions: π,√2,√3 etc. Are not rational number

Irrational Numbers
Numbers can not written in the form a/b with a&b as an integers...
Irrational Numbers are not #terminating & #not_repeating.