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Operator Block

Operator blocks are color-coded light-green and are used to script math equations and string handling.

Boolean

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Note: Boolean data type is a data type with only two possible values: True or False.

Given below are the several Boolean blocks:

Block

Function
() less than ()The block checks if the first value is less than the second value. If it is less, the block returns true; if not, it returns false. This block works with letters too, as well as numbers. In Scratch, letters at the top of the alphabet (e.g. a, b, c) are worth less than letters at the end (e.g. x, y, z).

() equals to ()The block checks if the first value is equal to the other value. If the values are equal, the block returns true; if not, false. This block is not case-sensitive.

() greater than ()The block checks if the first value is greater than the other value. If the second value is less, the block returns true; if not, it returns false.

() and ()The block joins two Boolean blocks so they both have to be true to return true. If they are both true, the block returns true; if they are not all true or none true, it returns false.

() or ()The block joins two Boolean blocks so any one of them can be true to return true — if at least one of them is true, the block returns true; if neither of them are true, it returns false.

not ()The block checks if the Boolean inside it is false — if it is false, the block returns true; if the condition is true, it returns false.

Reporter

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Note: Reporter blocks returns values.

Given below are some of the reporter blocks:

Block

Function
() + ()The block adds two values and reports the result.

The numbers can be typed directly into the block, or Reporter blocks can be used instead.

This block can be stacked inside itself; this can be used to fit more numbers in.
() - ()The block subtracts the second value from the first and reports the result.

() x ()The block multiplies the two values and reports the result.

() divided ()The block divides the second value from the first and returns the result.

If the first value is not evenly divisible by the second, the reported value will have decimals. To find the remainder instead, use the () Mod () block.

Note, dividing by 0 in the online editor will return infinity, 0, or negative infinity. It depends on if the numerator is positive, 0, or negative; respectively.

pick random () to ()The block picks a pseudorandom number ranging from the first given number to the second, including both endpoints. If both numbers have no decimals, it will report a whole number. For example, if a 1 and a 3 were inputted, the block could return a 1, 2 or 3. If one of the numbers has a decimal point, even .0, it reports a number with a decimal. For example, if 0.1 and 0.14 were given, the output will be 0.1, 0.11, 0.12, 0.13, or 0.14.

join () ()The block concatenates, or "links" the two values together and reports the result — for example, if "hello" and "world" were put in the block, it would report "helloworld".

letter () of ()The block reports the specified character of the given text. Even though the block says "letter", it will report all characters, including letters, numbers, symbols, and even spaces.

length of ()The block reports how many characters the given string contains.

() mod ()The block reports the remainder of the division when the first value is divided by the second. For example, when 10 is put in the first input and 3 in the second, the block will report 1; 10 divided by 3 gives a remainder of 1.

round ()The block rounds the given number to the nearest integer. It follows the standard rules of rounding; decimals that are .5 or higher are rounded up, whereas decimals less than .5 are rounded down.

() math of ()The block performs a specified function on a given number and reports the result.

The function can be changed by clicking the down arrow and selecting a new function from the drop-down menu.

This work, “Operator Block”, is a derivative of “Operator Block” by Scratch, used under CC BY-SA 4.0. “Operator Block” is licensed under CC BY-SA 4.0 by STEMpedia.

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Content is available under CC BY-SA 4.0 unless otherwise noted.

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