Constant means an ongoing situation or thing.
You can define a constant using the define() directive.you can use this a number of ways;to define a variable to a constant do:$string = "hello";define("string",$string);to define a string to a constant use:define("hello","there");to define a integer or other numerical value use:define("number",1.0);Summery:to define a string use quotes as you would do a string.Unlike variables in PHP a constant cannot be changed or undefined once it is defined. Constant remains automatically globally throughout the script. It means that it can be accessed from inside a function. e.g.
if you define y = constant then the slope of any constant is 0 so if you define the line y = 0 the slope of 0 is 0.
Constant means that it never changes. Variable means that it could, and likely will change. There are 24 hours in a day, so that is a constant. The weather is variable, so it could be cloudy, rainy, windy, or sunny.
In Scilab, predefined numerical constants are typically defined using the % character. For example, %pi represents the mathematical constant π (pi), and %e represents Euler's number (e). These constants are built into Scilab and can be used directly in calculations without needing to define them explicitly.
the controlled variables are the factors that are kept constant during an experiment. if they are not kept constant then they may affect the outcome of the experiment. the manipulated variable is the factor that is different between the experiment and the control. the responding variable is the variable that is being measured in the experiment.
You can define a constant using the define() directive.you can use this a number of ways;to define a variable to a constant do:$string = "hello";define("string",$string);to define a string to a constant use:define("hello","there");to define a integer or other numerical value use:define("number",1.0);Summery:to define a string use quotes as you would do a string.Unlike variables in PHP a constant cannot be changed or undefined once it is defined. Constant remains automatically globally throughout the script. It means that it can be accessed from inside a function. e.g.
A constant of 5 called MYCONST would be declared as #define MYCONST 5. This is because the statement used is a define statement.
if you define y = constant then the slope of any constant is 0 so if you define the line y = 0 the slope of 0 is 0.
The specific rate constant a proportionally determined constant that is usually different for various reactions with changes in temperature.
Please define what you mean by "constant". Thank You!
In C there is no constant with a name. It is done with the preprocessor directive of #define as in #define pi 3.1416 The preprocesor substitutes every occurance of word pi (with blanks on either side) with 3.1416
I'm not exactly sure that this is a question, but here you are:#define YES 1
The product of resistance and capacitance is referred to as the time constant. It determines rate of charging and discharging of a capacitor.
Ratio of the perimeter of a circle (circumference) to its diameter
Constant means that it never changes. Variable means that it could, and likely will change. There are 24 hours in a day, so that is a constant. The weather is variable, so it could be cloudy, rainy, windy, or sunny.
My loose definition of constant returns to scale:Constant returns to scale occur when a given increase in output is brought about by the same proportional increase in returns.
use: define("GREETING", "Hello you.", true); 1st parameter is the name for your constant 2nd parameter is the value of that constant 3rd parameter is whether or not you want the constant to be case-insensitive. Default is case sensitive. http://php.net/manual/en/function.define.php