definition of set notation chapter 1 class 12th in Urdu

Definition of set Notation

Set Notation

what is the set notation? Here we will describe some important sets, so you can easily understand. This post belongs to chapter 1 “function and limits” for 12th class students and above.

Set Notation

we are mentioning few sets below to define some important sets. For more detail watch the video below.


(1) Set of Natural numbers is basically denoted by “N”.

N: {1,2,3.4,5,6,…..}

(2) set of Whole numbers is denoted by “W”.


(3) set of Integers is denoted by “Z”.

Z: {……,-4,-3,-2,-1,0,+1,+2,+3,+4,….}

(3.1) Set of positive Integers is denoted by “Z+”. Z: {+1,+2,+3,+4,…..}

(3.2) Set of Nagetive Intergers is denoted by “Z¯”. Z‾: {-1,-2,-3,-4,…….}

(4) set of Even numbers is represented by “E”. E: {0,±2,±4,±6,±8,…..}

(5) Set of Odd numbers is symbolize “O”. O: {±,1,±,3,±,5,±7,…..}

You can download free notes from here.

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