CODEWITHSUNDEEP
angulartypescript
Behader
Behader

Reputation: 23

Type 'string' is not assignable to type 'number'

I really did not understand how the type assignment system works for variables in typescript. Can anyone help me why this does not work. Thank you

valorParcela:number;
totalCost:number;
VendaProdutoVendaNParcelas: number;

this.valorParcela = Number( this.totalCost / this.VendaProdutoVendaNParcelas).toFixed(2);

I expected a simple parseFloat

Upvotes: 2

Views: 2702

Answers (3)

Raja Jaganathan
Raja Jaganathan

Reputation: 36187

toFixed() returns string. throwing an error because trying to assign to the number type. so just cast to Number(expression) again or make this variable as string this.valorParcela

this.valorParcela = Number(Number(this.totalCost / this.VendaProdutoVendaNParcelas).toFixed(2)));

Upvotes: 0

Pardeep Jain
Pardeep Jain

Reputation: 86790

.toFixed(2);

Always returns string.

And you have assigned type number.

Upvotes: 1

Titian Cernicova-Dragomir
Titian Cernicova-Dragomir

Reputation: 250206

toFixed returns a string which you are assigning to a variable which should be number. You need another pair of () to convert the result of toFixed back to number

this.valorParcela = Number(( this.totalCost / this.VendaProdutoVendaNParcelas).toFixed(2));

Or you can use the unary + trick to perform number conversion:

this.valorParcela = +(this.totalCost / this.VendaProdutoVendaNParcelas).toFixed(2);

Upvotes: 4

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