# TI-BASIC:Square Root

From Learn @ Cemetech

Jump to navigationJump to search**Command Summary**

Take the square root of a number.

**Command Syntax**

√(*input*)

**Menu Location**

Press 2nd √ to paste the √( command.

TI-83/84/+/SE

1 byte

Takes the square root of a positive or negative number. It works exactly the same as 2^{×}√ or ^(1/2) but is smaller and uses an ending parenthesis. If used on a list, it will return a list with the square root of each element.

√(4) 2 √(2) 1.414213562 √({1,-1}) {1 i}

This may return a complex number or throw ERR:NONREAL ANS (depending on mode settings) if taking the square root of a negative number.

# Optimization

Never raise something to the one-half power explicitly; use this command instead.

:X^(1/2)→X can be :√(X→X

# Error Conditions

**ERR:NONREAL ANS**when taking the square root of a negative number in Real mode.