Skip to main content

Operators blocks

Operators do maths, compare values, combine logic, and manipulate text. They are all reporters or booleans, so they plug into the slots of other blocks rather than standing on their own.

Maths​

  • ( ) + ( ), -, *, / are addition, subtraction, multiplication, and division.
  • pick random 1 to 10 returns a random number in the range. If both inputs are whole numbers it returns an integer, otherwise a decimal.
  • ( ) mod ( ) returns the remainder (using floored division, so the result matches the sign of the divisor).
  • round ( ) rounds to the nearest whole number.
  • abs / floor / ceiling / sqrt / sin / cos / tan / asin / acos / atan / ln / log / e ^ / 10 ^ of ( ) applies a maths function chosen from the menu.

Comparison and logic​

  • ( ) < ( ), ( ) = ( ), ( ) > ( ) compare two values.
  • < > and < >, < > or < > combine two booleans.
  • not < > inverts a boolean.

Text​

  • join apple banana joins two values into one string.
  • letter 1 of apple returns a single character by position.
  • length of apple returns the number of characters.
  • apple contains a ? reports whether the text contains a substring (case-insensitive).

Bilup and TurboWarp extras​

These operators are not in stock Scratch:

  • letters 1 to 3 of apple returns a substring between two positions.
  • item in apple (index_of) returns the position of a substring, or 0 if not found (case-insensitive).
  • replace a with - in apple replaces every occurrence of a substring (case-insensitive).
  • ab repeated 3 times repeats a string a number of times.
  • upper / lower case of Apple changes the case of text.
  • trim apple removes leading and trailing whitespace.
  • clamp 5 between 0 and 10 limits a number to a range.
  • min of ( ) and ( ) / max of ( ) and ( ) return the smaller or larger value (these accept more than two operands).
  • pi reports the constant 3.14159..., handy for circle maths.
  • newline reports a line-break character, for building multi-line strings.

See Bilup extras for the full list.

See also​