Creating algorithms(for computers)

Creating algorithms(for computers)

1. Representing selection and iteration in a flowchart

2. Representing selection and iteration in pseudo-code

   • Selection
     • IF...THEN...ELSE statement
     • IF...THEN statement
     • rational operators
       • =, >=, <=, <, >, <>
   • Nested selection
   • Iteration
     • Indefinite iteration
       • REPEAT...UNTIL
       • WHILE...DO
     • Definite iteration
       • REPEAT...TIMES
       • FOR
       • Logical operators
         • AND
           • both must be true for the statement to be true
         • OR
           • either must be true for the statement to be true
         • NOT
           • reverses the logic of the AND and OR statements
             • yes and yes(yes) becomes no
             • yes or no(yes) becomes no
             • no and yes(no) becomes yes
   • Nested loops
     • comprises a loop within a loop
     • & - append operator
     • concatenation

3. selection and iteration

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