Math operation characters:
Math symbol '+' Addition
 NewValue := 5 + 1;
 writeln(NewValue);
  Returns 6

Math symbol '-' Subtraction
 NewValue := 7 - 5;
 writeln(NewValue);
 Returns 2

Math symbol '*' Multiplication
 NewValue := 7 * 5;
 writeln(NewValue);
 Returns 35

Math symbol '/' Division
 NewValue := 21 / 3;
 writeln(NewValue);
 Returns 7

Math symbol '^' power
 NewValue := 4 ^ 3;
 writeln(NewValue); 
 Returns 64

Math symbol '#' square route
 NewValue := 16 #;
 writeln(NewValue);
 Returns 4

Math symbol '~' round the number to integer
 intValue := 444.2 ~;
 writeln(NewValue); 
 Returns 444
 
 intValue := 134.7 ~;
 writeln(NewValue); 
 Returns 135

Math symbol '%' modulus
 NewValue := 4 % 2;
 writeln(NewValue); 
 Returns 0
 
 NewValue := 10 % 3;
 writeln(NewValue); 
 Returns 1

:: Please note: when doing mathematical operations with variables,
                GibPascal does left to right operations.

:: Example:
program mathtest;

var testInt : integer;

begin
  testInt := 7 + 10 * 4;
  writeln(testInt);
 returns 68

 testInt := 10 * 4 + 7;
 writeln(testInt);
 returns 47