Built-in math functions in SASS - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to calculate the square root of 16 using a built-in math function.

SASS

$result: math.[1](16);

Drag options to blanks, or click blank then click option'

Asqrt

Bpow

Cabs

Dround

Attempts:

3 left

💡 Hint

Common Mistakes

Using math.pow instead of math.sqrt

Using math.abs which returns absolute value

Using math.round which rounds numbers

The math.sqrt() function returns the square root of a number. Here, it calculates the square root of 16, which is 4.

2fill in blank

medium

Complete the code to round the number 4.7 down to the nearest whole number.

SASS

$rounded: math.[1](4.7);

Drag options to blanks, or click blank then click option'

Aabs

Bceil

Cround

Dfloor

Attempts:

3 left

💡 Hint

Common Mistakes

Using math.ceil which rounds up

Using math.round which rounds to nearest

Using math.abs which returns absolute value

The math.floor() function rounds a number down to the nearest whole number. So 4.7 becomes 4.

3fill in blank

hard

Fix the error in the code to get the absolute value of -10.

SASS

$absValue: math.[1](-10);

Drag options to blanks, or click blank then click option'

Aabs

Bpow

Csqrt

Dround

Attempts:

3 left

💡 Hint

Common Mistakes

Using math.round which rounds numbers

Using math.pow which raises to a power

Using math.sqrt which finds square root

The math.abs() function returns the absolute value of a number, turning negative numbers positive.

4fill in blank

hard

Fill both blanks to calculate 2 raised to the power of 3.

SASS

$power: math.[1](2, [2]);

Drag options to blanks, or click blank then click option'

Apow

B3

C4

Dsqrt

Attempts:

3 left

💡 Hint

Common Mistakes

Using math.sqrt instead of math.pow

Using 4 instead of 3 as exponent

Swapping base and exponent

The math.pow(base, exponent) function raises the base to the power of the exponent. Here, 2³ equals 8.

5fill in blank

hard

Fill all three blanks to create a map of words to their lengths, but only include words longer than 3 characters.

SASS

$lengths: ([1]: [2] for [3] in $words if str-length([3]) > 3);

Drag options to blanks, or click blank then click option'

Aword

Bstr-length(word)

Dlength

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'length' instead of 'str-length(word)'

Using a different variable name in the loop

Not filtering words by length

This code creates a map where each word is a key, and its length (found by str-length(word)) is the value. The loop variable is also word. Only words longer than 3 characters are included.

Practice

1. What is the purpose of Sass built-in math functions?

easy

A. To perform calculations like rounding and comparing numbers in styles

B. To create animations in CSS

C. To add images to the webpage

D. To write HTML code inside Sass files

Solution

1. Step 1: Understand Sass math functions

   Sass math functions help with calculations such as rounding, min/max, and converting units.

2. Step 2: Identify the correct purpose

   Only To perform calculations like rounding and comparing numbers in styles describes calculation tasks related to styles, which is what Sass math functions do.

3. Final Answer:

   To perform calculations like rounding and comparing numbers in styles -> Option A

4. Quick Check:

   Math functions = calculations [OK]

Hint: Math functions handle numbers and calculations in Sass [OK]

Common Mistakes:

• Confusing math functions with animation or HTML tasks
• Thinking math functions add images
• Assuming math functions write HTML code

2. Which of the following is the correct way to import the Sass math module?

easy

A. @use 'sass:math';

B. @import 'math';

C. @include math();

D. @require 'sass/math';

Solution

1. Step 1: Recall Sass module import syntax

   Sass uses the @use rule to import built-in modules like math.

2. Step 2: Match correct syntax

   The correct syntax is @use 'sass:math';. Other options use outdated or incorrect syntax.

3. Final Answer:

   @use 'sass:math'; -> Option A

4. Quick Check:

   Import math module = @use 'sass:math'; [OK]

Hint: Use '@use' with 'sass:math' to import math functions [OK]

Common Mistakes:

• Using @import instead of @use
• Trying @include for importing modules
• Using incorrect path or syntax

3. What is the output of this Sass code?

@use 'sass:math';

$val: math.ceil(4.3);
.result {
  width: $val * 1rem;
}

medium

A. .result { width: 4rem; }

B. .result { width: 4.3rem; }

C. Syntax error

D. .result { width: 5rem; }

Solution

1. Step 1: Understand math.ceil function

   math.ceil(4.3) rounds 4.3 up to the nearest whole number, which is 5.

2. Step 2: Calculate the width property

   Width is set to 5 * 1rem = 5rem, so the output CSS is .result { width: 5rem; }.

3. Final Answer:

   .result { width: 5rem; } -> Option D

4. Quick Check:

   Ceil(4.3) = 5rem [OK]

Hint: Ceil rounds up to next whole number [OK]

Common Mistakes:

• Confusing ceil with floor (round down)
• Using original decimal value instead of rounded
• Expecting syntax error due to module import

4. Identify the error in this Sass code snippet:

@use 'sass:math';

$angle: 45deg;
$half: math.div($angle, 2px);
.box {
  transform: rotate($half);
}

medium

A. Incorrect import syntax for math module

B. Missing semicolon after $angle declaration

C. math.div cannot divide units like degrees

D. transform property does not accept variables

Solution

1. Step 1: Check math.div usage with units

   math.div divides numbers but cannot divide units like degrees directly.

2. Step 2: Understand unit division rules

   Dividing 45deg by 2px is invalid because degrees and px are incompatible units; math.div expects unitless numbers or compatible units.

3. Final Answer:

   math.div cannot divide units like degrees -> Option C

4. Quick Check:

   math.div with units like deg = error [OK]

Hint: math.div only divides numbers without incompatible units [OK]

Common Mistakes:

• Assuming math.div works with all units
• Ignoring unit compatibility in division
• Thinking transform can't use variables

5. You want to create a responsive font size that is the smaller of 3rem or 5rem using Sass math functions. Which code correctly sets $font-size to this value?

hard

A. @use 'sass:math';
$font-size: math.max(3rem, 5rem);

B. @use 'sass:math';
$font-size: math.min(3rem, 5rem);

C. $font-size: min(3rem, 5rem);

D. @use 'sass:math';
$font-size: math.round(3rem, 5rem);

Solution

1. Step 1: Understand the goal

   You want the smaller value between 3rem and 5rem for responsive font size.

2. Step 2: Identify correct Sass math function

   math.min() returns the smaller of two values. math.max() returns the larger, and math.round() rounds numbers, so they are incorrect here.

3. Final Answer:

   @use 'sass:math'; $font-size: math.min(3rem, 5rem); -> Option B

4. Quick Check:

   Use math.min for smallest value [OK]

Hint: Use math.min to pick smaller value between two units [OK]

Common Mistakes:

• Using math.max instead of math.min
• Omitting @use import for math module
• Trying to round instead of compare values