fix(input-number): avoid redundant calculation

Author: Nicoss54

packages/primeng/src/inputnumber/inputnumber.ts

@@ -40,6 +40,7 @@ export const INPUTNUMBER_VALUE_ACCESSOR: any = {
     useExisting: forwardRef(() => InputNumber),
     multi: true
 };
+
 /**
  * InputNumber is an input component to provide numerical input.
  * @group Components
@@ -402,20 +403,23 @@ export class InputNumber extends BaseComponent implements OnInit, AfterContentIn
      * @group Props
      */
     @Input({ transform: booleanAttribute }) autofocus: boolean | undefined;
+
     /**
      * When present, it specifies that the element should be disabled.
      * @group Props
      */
     @Input() get disabled(): boolean | undefined {
         return this._disabled;
     }
+
     set disabled(disabled: boolean | undefined) {
         if (disabled) this.focused = false;
 
         this._disabled = disabled;
 
         if (this.timer) this.clearTimer();
     }
+
     /**
      * Spans 100% width of the container when enabled.
      * @group Props
@@ -639,6 +643,7 @@ export class InputNumber extends BaseComponent implements OnInit, AfterContentIn
         const decimalChar = this.getDecimalChar();
         return new RegExp(`[${decimalChar}]`, 'g');
     }
+
     getDecimalChar(): string {
         const formatter = new Intl.NumberFormat(this.locale, { ...this.getOptions(), useGrouping: false });
         return formatter
@@ -1516,7 +1521,7 @@ export class InputNumber extends BaseComponent implements OnInit, AfterContentIn
     writeValue(value: any): void {
         this.value = value ? Number(value) : value;
         if (this.input) {
-            this.input.nativeElement.value = value ? Number(value) : value;
+            this.input.nativeElement.value = String(this.value);
         }
         this.cd.markForCheck();
     }