What is Argument in Programming?

An argument is a statement that explains why something should happen. When applied to programming, an argument can take the form of a function call, or it could be in the form of data passed into a function. Arguments are often used as input for functions so that they will execute properly.

An argument can also be shortened to arg, and it is a data value that is passed by the user into a command, routine, or function.

Example in Python

The following code will print “Hello World” to the console. To do this, there is one argument that is passed into a function called `print`. Within the brackets of the call to `print`, it states what should be printed which is simply ‘hello’.

//print out a string
print('Hello World')

Example in PHP

The example shows how to use a function to display a number as float with 2 decimal.

function f($source, $decimal = 2){        
    return number_format(floatval($source), $decimal, '.', ',');

echo f('1000'); //1000.00

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