जानिये जावा के Variables और उनके Scopes के बारे में

 Variable: - Programs Execution ds nkSjku ftudh Value Change gksrh jgrh gSaA

Constant: - Value Fixed jgrh gSaA

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Variables Declaration: - Java esa Variable dks muds mi;ksx ls igys Declare fd;k tkrk gSaA

Syntax: - Type Identifier = Value;

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Dynamic Initialization of Variables: -Variables ds Dynamic Initialization esa uhps fy[ks Program ds varxZr 2 Variables dks Double Value ls Initialize fd;k tkrk gSaA rFkk rhljk Variable es mUgha Value dks dke esa ysrs gq, ge Variable dk Dynamic Initialize djrs gSAValid Expressions dks dke esa ysdj B Variable Declaration Allow djrh gSaA

class My

{

public static vaid main (String a [])

{

double a = 3.0;

double b = 4.0;

double c;

c = Math.sqrt (a*a+b*b);

                                   

                               class      method

System.out.println (“The Square root of  a and b is:”+ c);

}

}

Scope& Life time Variables:- dksbZ Hkh Variable Main Method ds vanj gh Declare fd;k tkrk gSaA ysfdu Java, Variables dks fdlh Hkh Block esa Declare djus dh vuqefr nsrh gSaA Block, Middle Bracket ({}) ls 'kq: gksrk gSaA rFkk mlh ds lkFk [kRe gksrk gSa rFkk Block ds }kjk gh Variable dk Scope r; fd;k tkrk gSaA cgqr lh Language, Variables ds Scopes dks 2 Categories esa divide djrh gSaA

(i) Global           (ii) Local

Perl, Java esa cgqr ls Global Variable Scope dks mi;ksx esa fy;k tk ldrk gSaA Java vius&vius vyx Scope: -

(i) Variables Defined By Class.

(ii) Variables Defined by Methods

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Scope ftls Method ds }kjk define fd;k x;k gSaA {} ls 'kq: gksrs gSa] rFkk mudk Scope {} ds can gksus rd jgrk gSaA vr% ;g dg ldrs gSa fd Java Hkh Local o Global Variable dks fHkUu djrh gSaAmUgsa Access fd;k tk ldrk gSaA Scope dks Nested Hkh fd;k tk ldrk gSaA