JavaScript: Cast a square root of a number to an integer

JavaScript Math: Exercise-30 with Solution

Cast Square Root to Integer

Write a JavaScript function to cast the square root of a number to an integer.

Test Data:
console.log(sqrt_to_int(17));
4

Sample Solution:

JavaScript Code:

// Define a function named sqrt_to_int that calculates the square root of a number and returns the integer part of the result.
function sqrt_to_int(num)
{
    // Compute the square root of num using Math.sqrt(), convert it to a string, and parse it to an integer using parseInt().
    return parseInt(Math.sqrt(num)+"");
}

// Output the result of calculating the square root of 17 and converting it to an integer to the console.
console.log(sqrt_to_int(17));

Output:

4

Flowchart:

Live Demo:

See the Pen javascript-math-exercise-30 by w3resource (@w3resource) on CodePen.

For more Practice: Solve these Related Problems:

• Write a JavaScript function that computes the square root of a number and casts the result to an integer by truncating decimals.
• Write a JavaScript function that calculates the square root and uses bitwise operators to extract the integer portion.
• Write a JavaScript function that returns the integer part of the square root using Math.floor, and handles edge cases.
• Write a JavaScript function that computes the square root and then casts it to an integer, ensuring proper rounding for negatives.

Go to:

• JavaScript Math and Numbers Exercises Home ↩
• JavaScript Exercises Home ↩

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