How to cancel one keyboard input when another input is held?

Basically, the player sprite can charge a jump left or right by holding down the left or right arrow keys. The problem I have is by holding down the right key and then pressing the left key, it interrupts the charging I was initiating with the right key. And vice versa. How would I go about avoiding this? Thanks

Create global variable 'state'

when right or left key is down --> set 'state' to 1

else --> set 'state' to 0

state=1 --> do a charging

charging is complete..

sub event: on release key left --> jump to left

sub event: on release key right --> jump to right