javascript add string to middle of string
function addStr(str, index, stringToAdd){
return str.substring(0, index) + stringToAdd + str.substring(index, str.length);
}
let str = "This is a string";
let stringToAdd = "modyfied ";
console.log(addStr(str, 10, stringToAdd)); //outPut : "This is a modified string"add char in specific index stirng javascript
int j = 123456;
String x = Integer.toString(j);
x = x.substring(0, 4) + "." + x.substring(4, x.length);
//output : 1234.56Copyright © 2021 Codeinu
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