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12 lines
553 B
12 lines
553 B
5 years ago
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// indexOf(): Takes takes a substring and if the substring exists in a string it returns the first position of the substring if does not exist it returns -1
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string.indexOf(substring)
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let string = '30 Days Of JavaScript'
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console.log(string.indexOf('D')) // 3
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console.log(string.indexOf('Days')) // 3
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console.log(string.indexOf('days')) // -1
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console.log(string.indexOf('a')) // 4
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console.log(string.indexOf('JavaScript')) // 11
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console.log(string.indexOf('Script')) //15
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console.log(string.indexOf('script')) // -1
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