TypeScript - Assignment Operators Examples

Operator	Description	Example
= (Simple Assignment)	Assigns values from the right side operand to the left side operand	C = A + B will assign the value of A + B into C
+= (Add and Assignment)	It adds the right operand to the left operand and assigns the result to the left operand.	C += A is equivalent to C = C + A
-= (Subtract and Assignment)	It subtracts the right operand from the left operand and assigns the result to the left operand.	C -= A is equivalent to C = C - A
*= (Multiply and Assignment)	It multiplies the right operand with the left operand and assigns the result to the left operand.	C = A is equivalent to C = C A
/= (Divide and Assignment)	It divides the left operand with the right operand and assigns the result to the left operand.

Note − Same logic applies to Bitwise operators, so they will become <<=, >>=, >>=, &=, |= and ^=.

Example

var a: number = 12 
var b:number = 10  

a = b 
console.log("a = b: "+a)

a += b
console.log("a+=b: "+a)

a -= b 
console.log("a-=b: "+a)

a *= b 
console.log("a*=b: "+a)

a /= b 
console.log("a/=b: "+a)    

a %= b 
console.log("a%=b: "+a)

On compiling, it will generate the following JavaScript code −

var a = 12; 
var b = 10; 
a = b;

console.log("a=b: " + a); 
a += b; 

console.log("a+=b: " + a); 
a -= b; 

console.log("a-=b: " + a); 
a *= b; 

console.log("a*=b: " + a); 
a /= b; 

console.log("a/=b: " + a); 
a %= b; 
console.log("a%=b: " + a);

It will produce the following output −

a = b: 10 
a += b: 20 
a -= b: 10 
a *= b: 100 
a /= b: 10 
a %= b: 0

typescript_operators.htm