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Assignment Operators

How to assign a incremental value to a variable in javascript?
Different assignment operators and their purpose?

Explanation

Assignment Operators are use to assign a value to a variable.
 Operator Syntax Description Example = used to assign a value on the right side to the variable of the left side of the operator. b = 3; += it adds the value on the right to the previous value of the variable on the left and assign the new value to the variable. b = 3;b += 4;// Now b will become 7 -= it subtracts the value on the right to the previous value of the variable on the left and assign the new value to the variable. b = 4;b -= 2;// Now b will become 2 *= it multiplies the operand on the right to the previous value of the variable on the left and assaigns the new value to the variable. b = 4;b *= 2;// Now b will become 8 /= it divides the operand on the right to the previous value of the variable on the left and assaigns the new value to the variable. b = 6;b /= 2;// Now b will become 3 <<= The operand on the left is shifted left by the value on the right. - <<= A signed right shifted is performed on the left operand by the value on the right. -