Parsefloat parseint in Javascript

JavaScript provides three explicit type conversion functions: eval (), parseInt (), and parseFloat ().

Eval () function: converts a string expression to a numeric value. For example, the result of the statement total = eval ("432.1*10") is total = 4321, which is about to assign the value 4321 to the total variable.

ParseInt () function: converts a string to an integer. The return value starts with the first character of the string. If the character does not start with an integer, 0 is returned. The parseInt () function can also convert hexadecimal or decimal numbers.

For example, parseInt ("123xyz") returns 123, while parseInt ("xyz") returns 0.

ParseFloat () function: similar to the parseInt () function, it returns the first floating point number contained in the string. If the string does not start with a valid floating point number, 0 is returned.

For example, parseFloat ("2.1e4xyz") returns 21000, while parseFloat ("xyz") returns 0.

In JavaScript, The parseFloat function method returns the floating point number obtained by String Conversion. Usage:

ParseFloat (numString) where the numString parameter is a string containing a floating point number. In JavaScript, The parseFloat function method returns the number representation equal to the number saved in numString. If the numString prefix cannot be interpreted as a floating point number, NaN (not a number) is returned ).

ParseFloat ("abc") // return NaN.
ParseFloat ("1.2abc") // return 1.2.