Getting square root of a number in Julia – sqrt() and isqrt() Methods

The sqrt() is an inbuilt function in julia which is used to return the square root of the specified number and throws DomainError for negative Real parameter. It also accept complex negative parameter.

Syntax: sqrt(x) Parameters:

• x: Specified values.

Returns: It returns the square root of the specified number and throws DomainError for negative Real parameter. It also accept complex negative parameter.

Example:

# Julia program to illustrate
# the use of sqrt() method

# Getting the square root of the
# specified number and throws DomainError
# for negative Real parameter
println(sqrt(9))
println(sqrt(16))
println(sqrt(complex(-25)))
println(sqrt(-49))

Output:

3.0
4.0
0.0 + 5.0im
ERROR: LoadError: DomainError:
sqrt will only return a complex result if called with a complex argument. Try sqrt(complex(x)).
Stacktrace:
 [1] sqrt(::Int64) at ./math.jl:434
while loading /home/cg/root/9093667/main.jl, in expression starting on line 10

isqrt()

The isqrt() is an inbuilt function in julia which is used to return integer square root of the specified value. The largest returned integer value m(say) such that

Syntax: isqrt(n::Integer) Parameters:

• n::Integer: Specified values.

Returns: It returns integer square root of the specified value.

Example:

# Julia program to illustrate
# the use of isqrt() method

# Getting integer square root of the specified value.
println(isqrt(12))
println(isqrt(17))
println(isqrt(5))
println(isqrt(227))

Output:

3
4
2
15