I have to update parameter values based on whether the xyz pipeline in project pqr is successful or pipeline abc in project pqr is successful.

That is

pipeline successful   parameter value
    abc                aaa
    xyz                zzz

I am trying the below code in my pipeline but not successful

Powershell:

if ('$(pqr.abc.result)' -eq 'succeeded') {
    Write-Host "abc in pqr succeeded"
    Write-Host "Setting component directory to aaa"
    Write-Host "##vso[task.setvariable variable=component]$(Build.SourcesDirectory)assetsaaa"
}
elseif ('$(pqr.xyz.result)' -eq 'succeeded') 
{
    Write-Host "xyz in pqr succeeded"
    Write-Host "Setting component directory to zzz"
    Write-Host "##vso[task.setvariable variable=component]$(Build.SourcesDirectory)assetszzz"
}