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New Mexico Computer Science For All

New Mexico Computer Science For All. Statements and Expressions in NetLogo Maureen Psaila-Dombrowski. Statements and Expressions. Generally, a computer program is made up of two types of code: Statements Expressions. Statements. A statement is the smallest independent unit of code

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New Mexico Computer Science For All

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  1. New Mexico Computer Science For All Statements and Expressions in NetLogo Maureen Psaila-Dombrowski

  2. Statements and Expressions • Generally, a computer program is made up of two types of code: • Statements • Expressions

  3. Statements • A statement is the smallest independent unit of code • Usually a statement produces an action

  4. Statements in NetLogo: Commands • Statements in NetLogo are called COMMANDS • There are many pre-defined commands (primitives) in NetLogo • Typically they begin with a verb, such as “create”, “forward”, “clear”, “hatch”.... ask turtles [ forward 1 ]

  5. Expressions • It is the smallest unit of calculation. • Expression represents or evaluates to a value • Single values (values, constant or variable) • Combinations of values interconnected with operators (25+12, a+b, x=y+12), or functions • If more than one operation occurs in an expression, the order of operations is used to determine the order they are performed in. • That value is what the computer uses instead of the expression.

  6. Expressions in NetLogo • Similar to other programming languages • Equals something (evaluates to something)

  7. Summary • There are two types of code: • Statements or Commands in NetLogo • The smallest independent unit of code • Produces an action • Expressions • The smallest unit of calculation • Produces (or evaluates to) a value

  8. Further Information • If you would like more information: • NetLogo Manual • NetLogo Dictionary

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