Checkbox angular material checked by default

Question

I am trying to use an Angular Material checkbox, and set it by default as checked, but it is displayed as non-checked, what is wrong?

Answer 1

Set this in HTML:

    

        

             Display 1
        
        

              Display 2 
        
        

              Display 3 
        
        

              Display 4
        
        

             Display 5 
        
    

Changes in Ts file

this.Form = this.formBuilder.group({
a: false,
b: false,
c: false,
d: false,
e: false,
});

Conditionvalidation in Ur Business logic

if(true){
this.Form.patch(a: true);
}