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Lowertoupper
// lowercase to upper case function lowertoupper(str){ var uppercase ="ABCDEFGHIJKLMNOPQRSTUVWXYZ"; var lowercase ="abcdefghijklmnopqrstuvwxyz"; var bag =""; for(var i = 0; i < str.length; i++){ for(var j = 0; j < lowercase.length; j++){ if(str[i] == lowercase[j]){bag = bag + uppercase[j]; break;} } } return bag; } var arr = ["aws","certified","cloud","practitioner"]; var ARR =[]; for(var i = 0; i < arr.length; i++){ ARR.push(lowertoupper(arr[i])); ; } console.log(ARR);
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