Using INCLAN variables - Revision history

Guentert at 15:58, 15 December 2025

2025-12-15T15:58:51Z

← Older revision		Revision as of 17:58, 15 December 2025
Line 23:		Line 23:
	cyana> show y		cyana> show y
	y = 35		y = 35
	Expressions formed according to the rules of Fortran-77 may contain integer, real and complex numbers, logicals (Boolean values), and character strings. Within expressions character strings must be enclosed in single quotes:		Expressions formed according to the rules of Fortran-77 may contain integer, real and complex numbers, logicals (Boolean values), and character strings. Within expressions, character strings must be enclosed in single quotes:

	cyana> s:=cyana		cyana> s:=cyana

Guentert at 11:04, 14 August 2009

2009-08-14T11:04:11Z

← Older revision		Revision as of 13:04, 14 August 2009
Line 5:		Line 5:
	My name is Cyana.		My name is Cyana.

	The operator “:=” assigns a string (“Cyana”) to a variable (“name”). $variable substitutes the value of a variable into the command line. In addition, variables with numeric values can be used in expressions in the same way as in Fortran or other programming languages:		The operator “:=” assigns a string (“Cyana”) to a variable (“name”). $''variable'' substitutes the value of a variable into the command line. In addition, variables with numeric values can be used in expressions in the same way as in Fortran or other programming languages:

	cyana> x=7		cyana> x=7

Guentert at 11:02, 14 August 2009

2009-08-14T11:02:42Z

← Older revision		Revision as of 13:02, 14 August 2009
Line 15:		Line 15:
	z = 5.0		z = 5.0

	(The INCLAN command [[INCLAN: show\|'''show''']] ~~show~~ displays the values of variables.) Here a different assignment sign, “=” instead of “:=”, was used. Assignments with “=” have the meaning: “Evaluate the expression on the right hand side and assign the result value to the variable on the left hand side.” Note the difference to a string assignment with “:=”:		(The INCLAN command [[INCLAN: show\|'''show''']] displays the values of variables.) Here a different assignment sign, “=” instead of “:=”, was used. Assignments with “=” have the meaning: “Evaluate the expression on the right hand side and assign the result value to the variable on the left hand side.” Note the difference to a string assignment with “:=”:

	cyana> y:=5*x		cyana> y:=5*x

Guentert at 11:02, 14 August 2009

2009-08-14T11:02:27Z

← Older revision		Revision as of 13:02, 14 August 2009
Line 15:		Line 15:
	z = 5.0		z = 5.0

	(The INCLAN command show displays the values of variables.) Here a different assignment sign, “=” instead of “:=”, was used. Assignments with “=” have the meaning: “Evaluate the expression on the right hand side and assign the result value to the variable on the left hand side.” Note the difference to a string assignment with “:=”:		(The INCLAN command [[INCLAN: show\|'''show''']] show displays the values of variables.) Here a different assignment sign, “=” instead of “:=”, was used. Assignments with “=” have the meaning: “Evaluate the expression on the right hand side and assign the result value to the variable on the left hand side.” Note the difference to a string assignment with “:=”:

	cyana> y:=5*x		cyana> y:=5*x

Guentert at 11:01, 14 August 2009

2009-08-14T11:01:33Z

← Older revision		Revision as of 13:01, 14 August 2009
Line 1:		Line 1:
	In INCLAN, string variables can be used in a similar way as in a Unix shell:		In INCLAN, string variables can be used in a similar way as in a Unix shell:
	cyana> name:=Cyana
	cyana> print "My name is $name."		cyana> name:=Cyana
	My name is Cyana.		cyana> print "My name is $name."
			My name is Cyana.

	The operator “:=” assigns a string (“Cyana”) to a variable (“name”). $variable substitutes the value of a variable into the command line. In addition, variables with numeric values can be used in expressions in the same way as in Fortran or other programming languages:		The operator “:=” assigns a string (“Cyana”) to a variable (“name”). $variable substitutes the value of a variable into the command line. In addition, variables with numeric values can be used in expressions in the same way as in Fortran or other programming languages:
	cyana> x=7
	cyana> y=5*x		cyana> x=7
	cyana> z=sqrt(y-10.0)		cyana> y=5*x
	cyana> show x y z		cyana> z=sqrt(y-10.0)
	x = 7		cyana> show x y z
	y = 35		x = 7
	z = 5.0		y = 35
			z = 5.0

	(The INCLAN command show displays the values of variables.) Here a different assignment sign, “=” instead of “:=”, was used. Assignments with “=” have the meaning: “Evaluate the expression on the right hand side and assign the result value to the variable on the left hand side.” Note the difference to a string assignment with “:=”:		(The INCLAN command show displays the values of variables.) Here a different assignment sign, “=” instead of “:=”, was used. Assignments with “=” have the meaning: “Evaluate the expression on the right hand side and assign the result value to the variable on the left hand side.” Note the difference to a string assignment with “:=”:
	cyana> y:=5*x
	cyana> show y		cyana> y:=5*x
	y = 5*x		cyana> show y
	cyana> y=5*x		y = 5*x
	cyana> show y		cyana> y=5*x
	y = 35		cyana> show y
			y = 35
	Expressions formed according to the rules of Fortran-77 may contain integer, real and complex numbers, logicals (Boolean values), and character strings. Within expressions character strings must be enclosed in single quotes:		Expressions formed according to the rules of Fortran-77 may contain integer, real and complex numbers, logicals (Boolean values), and character strings. Within expressions character strings must be enclosed in single quotes:
	cyana> s:=cyana
	cyana> l=lenstr(s)		cyana> s:=cyana
	*** ERROR: Illegal expression "lenstr(s)".		cyana> l=lenstr(s)
			*** ERROR: Illegal expression "lenstr(s)".

	This is an error because the variable s does not contain a quoted string (lenstr is an INCLAN function that returns the length of a string, i. e. the index of its last non-blank character). The correct use of simple, unquoted strings in an expression is:		This is an error because the variable s does not contain a quoted string (lenstr is an INCLAN function that returns the length of a string, i. e. the index of its last non-blank character). The correct use of simple, unquoted strings in an expression is:
	cyana> l=lenstr('$s')
	cyana> show l		cyana> l=lenstr('$s')
	l = 5		cyana> show l
			l = 5

	Single quotes do not inhibit variable substitutions.		Single quotes do not inhibit variable substitutions.

Guentert: Created page with 'In INCLAN, string variables can be used in a similar way as in a Unix shell: cyana> name:=Cyana cyana> print "My name is $name." My name is Cyana. The operator “:=” assigns a…'

2009-08-11T16:11:47Z

Created page with 'In INCLAN, string variables can be used in a similar way as in a Unix shell: cyana> name:=Cyana cyana> print "My name is $name." My name is Cyana. The operator “:=” assigns a…'

New page

In INCLAN, string variables can be used in a similar way as in a Unix shell:
cyana> name:=Cyana
cyana> print "My name is $name."
My name is Cyana.
The operator “:=” assigns a string (“Cyana”) to a variable (“name”). $variable substitutes the value of a variable into the command line. In addition, variables with numeric values can be used in expressions in the same way as in Fortran or other programming languages:
cyana> x=7
cyana> y=5*x
cyana> z=sqrt(y-10.0)
cyana> show x y z
x = 7
y = 35
z = 5.0
(The INCLAN command show displays the values of variables.) Here a different assignment sign, “=” instead of “:=”, was used. Assignments with “=” have the meaning: “Evaluate the expression on the right hand side and assign the result value to the variable on the left hand side.” Note the difference to a string assignment with “:=”:
cyana> y:=5*x
cyana> show y
y = 5*x
cyana> y=5*x
cyana> show y
y = 35
Expressions formed according to the rules of Fortran-77 may contain integer, real and complex numbers, logicals (Boolean values), and character strings. Within expressions character strings must be enclosed in single quotes:
cyana> s:=cyana
cyana> l=lenstr(s)
*** ERROR: Illegal expression "lenstr(s)".
This is an error because the variable s does not contain a quoted string (lenstr is an INCLAN function that returns the length of a string, i. e. the index of its last non-blank character). The correct use of simple, unquoted strings in an expression is:
cyana> l=lenstr('$s')
cyana> show l
l = 5
Single quotes do not inhibit variable substitutions.