squareRoot — GTM Variable Template for Number

VARIABLES › NUMBER

squareRoot EXTENDED Number

Direct (.tpl) Apply (.tpl)

Returns the square root of the provided number. Returns NaN if negative.

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Examples

Perfect square root▶ Try

INPUT

Number: 16

OUTPUT

4

Negative returns NaN▶ Try

INPUT

Number: -4

OUTPUT

true

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GTM Configuration

This is what you'll see when you open this variable in Google Tag Manager. Hover the icons for details.

squareRoot

Read-Only Try Live

Number

💾 The number to calculate the square root for.

Supported formats:
  ✓ Number
  ✓ String

Input Setup

Input Function (optional)

⚙️ Optional pre-processing function applied to the input before internal logic (e.g., convert object to string, normalize case). Internal transformations such as case handling will still apply afterward.

Result Handling

Output Function (optional)

⚙️ Optional function to apply to the result before returning it (e.g., str => str + ' €', val => val !== undefined for boolean conversion). Useful for chaining transformations on the output.

Number number

💡 Type any text to see the result update live

🎯 Using special value — click input to type instead

Test with:

Falsy undefined null "" empty 0 false NaN

Truthy true 42 "hello" {} empty [] empty {a:1} [1,2,3]

🔗 Result Handling — Chain Variables

Chain apply-mode variables to the output. Each variable receives the result of the previous one.

sqrt()

+ Chain another variable

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Related Variables

Same category: Number

→ absolute → addValues → calculateDiffRatio → calculateRatioPercentage → ceil → clamp → classifyByThreshold → countDigits → divide → floor → max → min → multiply → parseFloatValue → parseIntValue → subtractValues → toFixed → toInteger

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Under the Hood

📜 View Implementation Code

/**
* Returns the square root of the provided input.
* 
* @param {number|string} data.src - The number to calculate the square root for.
* @param {Function|string} [data.out] - Optional output handler: function to transform result or string with format.
*
* Direct-mode specific parameters:
* @param {Function} [data.pre] - Optional pre-processor function to transform src before calculation.
* 
* @returns {number} The square root of the input number, or NaN if the input is negative or invalid.
*
* @framework ggLowCodeGTMKit
*/
const Math = require('Math');
const makeNumber = require('makeNumber');

const sqrt = function(input) {
   const num = makeNumber(input);
   return Math.sqrt(num);
};

const safeFunction = fn => typeof fn === 'function' ? fn : x => x;
const out = safeFunction(data.out);

// ===============================================================================
// squareRoot - Direct mode
// ===============================================================================
const applyCast = (castFn, value) => safeFunction(castFn)(value);
const value = applyCast(data.pre, data.src);
return out(sqrt(value));
// ===============================================================================
// squareRoot() – Apply Mode: runtime parameter
// ===============================================================================
/*
return function(value) {
  return out(sqrt(value));
};
*/

🧪 View Test Scenarios (5 tests)

✅ '[example] Perfect square root'
✅ Non-perfect square - should return decimal square root
✅ String number - should convert and calculate
✅ Zero - should return zero
✅ '[example] Negative returns NaN'