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Scilab Help >> Scilab > Variables > global

global

Define global variable

Syntax

global('nam1',...,'namn')
global nam1 ... namn

Arguments

nam1,..., namn

valid variable names

Description

Ordinarily, each Scilab function, has its own local variables and can "read" all variables created in the base workspace or by the calling functions. The global keyword allow to make variables read/write across functions. Any assignment to that variable, in any function, is available to all the other functions declaring it global.

If the global variable does not exist the first time you issue the global statement, it will be initialized to the empty matrix.

Examples

//first: calling environment and a function share a variable
global a
a=1
deff('y=f1(x)','global a,a=x^2,y=a^2')
f1(2)
a
//second: three functions share variables
deff('initdata()','global A C ;A=10,C=30')
deff('letsgo()','global A C ;disp(A) ;C=70')
deff('letsgo1()','global C ;disp(C)')
initdata()
letsgo()
letsgo1()

See also

  • who — listing of variables
  • isglobal — checks if a local variable has a global counterpart
  • clearglobal — kills global variables
  • resume — return or resume execution and copy some local variables
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Last updated:
Thu Feb 14 14:57:07 CET 2019