Variable operation#

Writes to a variable a value you set yourself or the result of a calculation. The block suits counters, points in tests and quizzes, and calculating a total.

Settings#

• "Type of operation" — what exactly the block does:
  • "Arbitrary value" — write the given value to the variable;
  • "Mathematical expression" — change one variable: add, subtract, multiply, divide;
  • "Mathematical expression 2.0" — calculate an expression with several variables;
  • "Mass assignment" — write values to several variables at once.
• "Value/Expression" — what to write or what to calculate. How to fill in the field for each type is described below.
• "Result variable name" — the variable the result goes to.
• "Result variable type" — "Local variable" (each contact has their own) or "Global variable" (shared by the whole bot).

The "Mass assignment" type has none of these three fields — the "Variables to assign" list takes their place.

Arbitrary value#

Type text or a number in the "Value/Expression" field. Templates work here, including expressions, — so you can build the value from other variables and contact data.

Mathematical expression#

Calculates the variable's new value from its current value. In the expression the variable is always written as x — whatever name you gave in the "Result variable name" field. For example, x + 1 increases the variable by one.

• "Initial value of the variable" — if the variable did not exist before this block, the calculation starts from this number.

Mathematical expression 2.0#

The expression can use several variables. In the "Variables for Expression" list, click "Local variable" or "Global variable" and enter the variable name. Each one gets a short name: the first — x, the second — y, the third — z and so on. These short names are what you write in the expression, for example (x + y) * 10.

If one of the variables does not exist yet, 0 is used instead.

What you can write in a mathematical expression#

• Numbers, the +, -, *, / signs and brackets.
• Fractional numbers — with a dot: 1.24.
• Rounding up to a whole number: wrap the whole expression in ceil( ), for example ceil(x / 3).

{{ }} templates do not work in mathematical expressions — use the short variable names. The bot removes everything from the expression except numbers, signs and short names.

Mass assignment#

In the "Variables to assign" list, click "Local variable" or "Global variable", enter the variable name and its value. You can add several rows — the block writes all the values at once. Templates work in the values, but only with simple functions.

Outputs#

• "Continue" — the bot moves on right after saving.

Good to know#

• If a variable with this name does not exist yet, the block creates it.
• The result is saved as text. You can insert it into a message like any other variable.
• If the mathematical expression has an error — for example, division by zero, or the variable holds text instead of a number — an error message is written to the variable. Check the expression in the bot preview.