90-degree rotations

Shorthand notations are available to perform a $\pm 90$-degree rotation ($\pm \frac{\pi}{2}$ radians) around the x-axis or y-axis: X90, Y90, mX90 and mY90.

See also rotation operators.

Note that a shorthand notation for a 90-degree rotation around the z-axis is already provided. This is equal to the S-gate.

Examples: