PASCAL


 CONDITIONAL IF INSTRUCTION

 if condition then instruction;

 if condition then instruction else instruction;

 if condition then begin instructions; end else begin instructions; end;

In logical expressions we use comparison operators =, <>, <, >, <=, >= (equal to, miscellaneous, smaller, larger, smaller or equal, larger or equal) and and or logic operators.

Examples:

if a>b then write('The first number is greater than the second.')
else if b>a then write('The second number is greater than the first.')
else write('The numbers are equal.');
if (a>=b) and (b>=c) then write(' The first number is the highest.');


  CONDITIONAL CASE INSTRUCTION

This is a instruction that allows you to check multiple conditions without having to write multiple if instructions.
Example:

  randomize; {switching on the random generator }
  los = random(100)+1; {random a number from 1 to 100}
    case los of
       11: write('You have won the car.');
       27: write('You have won the book.');
       39: write('You have won chewing gum.');
    else write('You have not won anything!');
   end;