QUICK REFERENCE

Useful Pascal arithmetic functions
Commonly used arithmetic functions
Pascal function	Argument type	Function type	Function operation
sqrt(x)	integer or real	real	returns the square root of x (x >= 0)
random(x)	integer	integer	returns a random whole number between 0 and (x  -  1) inclusive
abs(x)	integer or real	same as argument	returns the absolute value of x (i.e. |x|  )
round(x)	integer or real	integer	returns the value of x rounded to the nearest integer
trunc(x)	integer or real	integer	returns the integer formed by removing the fractional part of x
Other useful arithmetic functions
Pascal function	Argument type	Function type	Function operation
sqr(x)	integer or real	same as argument	returns the square of x, i.e. x2
sin(x)	integer or real	real	returns the sine of x (in radians), i.e. sin x
cos(x)	integer or real	real	returns the cosine of x (in radians), i.e. cos x
arctan(x)	integer or real	real	returns the inverse tangent of x (result in radians), i.e. tan-1 x
ln(x)	integer or real	real	returns the natural logirithm of x, i.e. ln x
exp(x)	integer or real	real	returns the value of ex

EXERCISE

Exercise	Description	Open	Download
Exercise 2-1	Rectangle	click here	ex2-1.pas
Exercise 2-2	Sell Disks	click here	ex2-2.pas
Exercise 2-3	Letter	click here	ex2-3.pas
Exercise 2-4	Circle	click here	ex2-4.pas
Exercise 2-5	Age	click here	ex2-5.pas