CODE EXAMPLE FOR SHELL

my ip

ip route get 8.8.8.8 | awk -F"src " 'NR==1{split($2,a," ");print a[1]}'
ip route get 8.8.8.8 | awk 'match($0,/src (S*)/,a)&&$0=a[1]'
ip route get 8.8.8.8 | awk '{for(i=1;i<=NF;i++)if($i~/src/)$0=$(i+1)}NR==1'

ip route get 8.8.8.8 | sed -E 's/.*src (S+) .*/1/;t;d'
ip route get 8.8.8.8 | sed 's/.*src ([^ ]*).*/1/;t;d'
ip route get 8.8.8.8 | sed  -nE '1{s/.*?src (S+) .*/1/;p}'

ip route get 8.8.8.8 | grep -oP 'src K[^ ]+'
10.36.15.150