If you want to apply conditional validation on 'English' or 'Statstics', then you need to add 'Maths' input as '50'
{{resultInfoFormGroup.controls.maths.errors.minNumber.message}}
Shows Custom Validation Message
you can enter min number upto 35
{{resultInfoFormGroup.controls.science.errors.minNumber.message}}
If you want to apply conditional validation on 'English' then you need to add 'Maths' input as '50'.
Conditional Expression with type 'function'
{{resultInfoFormGroup.controls.english.errors.minNumber.message}}
Conditional validation will be applied if the 'Maths' field have value of '50'
you can enter min number upto 35
Conditional Expression with type 'string'
{{resultInfoFormGroup.controls.statstics.errors.minNumber.message}}