How Can I Perform Math on Strings in JavaScript?
Published on 2024-12-21
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Converting Strings to Numbers for Mathematical Operations
Despite containing numerical characters, strings cannot be directly manipulated as numbers. To perform arithmetic operations, it is necessary to first convert them into numerical form.
Consider the example given:
var num1 = '20',
num2 = '30.5';Adding these strings directly results in concatenation:
num1 num2; // '2030.5'
To force them to be treated as numbers, use the unary plus operator ( ):
num1 num2;
The unary plus operator coerces the strings into numerical data types before performing the addition, allowing for accurate mathematical operations:
num1 num2; // 50.5
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